content: // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  All rights reserved.
  // https://developers.google.com/protocol-buffers/
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //     * Neither the name of Google Inc. nor the names of its
  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  package com.google.protobuf;
  
  import static com.google.protobuf.UnittestLite.defaultBoolExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultBytesExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultCordExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultDoubleExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultFixed32ExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultFixed64ExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultFloatExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultForeignEnumExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultImportEnumExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultInt32ExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultInt64ExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultNestedEnumExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultSfixed32ExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultSfixed64ExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultSint32ExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultSint64ExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultStringExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultStringPieceExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultUint32ExtensionLite;
  import static com.google.protobuf.UnittestLite.defaultUint64ExtensionLite;
  import static com.google.protobuf.UnittestLite.oneofBytesExtensionLite;
  import static com.google.protobuf.UnittestLite.oneofNestedMessageExtensionLite;
  import static com.google.protobuf.UnittestLite.oneofStringExtensionLite;
  import static com.google.protobuf.UnittestLite.oneofUint32ExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalBoolExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalBytesExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalCordExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalDoubleExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalFixed32ExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalFixed64ExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalFloatExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalForeignEnumExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalForeignMessageExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalGroupExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalImportEnumExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalImportMessageExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalInt32ExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalInt64ExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalLazyMessageExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalNestedEnumExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalNestedMessageExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalPublicImportMessageExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalSfixed32ExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalSfixed64ExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalSint32ExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalSint64ExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalStringExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalStringPieceExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalUint32ExtensionLite;
  import static com.google.protobuf.UnittestLite.optionalUint64ExtensionLite;
  import static com.google.protobuf.UnittestLite.packedBoolExtensionLite;
  import static com.google.protobuf.UnittestLite.packedDoubleExtensionLite;
  import static com.google.protobuf.UnittestLite.packedEnumExtensionLite;
  import static com.google.protobuf.UnittestLite.packedFixed32ExtensionLite;
  import static com.google.protobuf.UnittestLite.packedFixed64ExtensionLite;
  import static com.google.protobuf.UnittestLite.packedFloatExtensionLite;
  import static com.google.protobuf.UnittestLite.packedInt32ExtensionLite;
  import static com.google.protobuf.UnittestLite.packedInt64ExtensionLite;
  import static com.google.protobuf.UnittestLite.packedSfixed32ExtensionLite;
  import static com.google.protobuf.UnittestLite.packedSfixed64ExtensionLite;
  import static com.google.protobuf.UnittestLite.packedSint32ExtensionLite;
  import static com.google.protobuf.UnittestLite.packedSint64ExtensionLite;
  import static com.google.protobuf.UnittestLite.packedUint32ExtensionLite;
  import static com.google.protobuf.UnittestLite.packedUint64ExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedBoolExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedBytesExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedCordExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedDoubleExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedFixed32ExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedFixed64ExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedFloatExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedForeignEnumExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedForeignMessageExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedGroupExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedImportEnumExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedImportMessageExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedInt32ExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedInt64ExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedLazyMessageExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedNestedEnumExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedNestedMessageExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedSfixed32ExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedSfixed64ExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedSint32ExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedSint64ExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedStringExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedStringPieceExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedUint32ExtensionLite;
  import static com.google.protobuf.UnittestLite.repeatedUint64ExtensionLite;
  import static protobuf_unittest.UnittestProto.OptionalGroup_extension;
  import static protobuf_unittest.UnittestProto.RepeatedGroup_extension;
  import static protobuf_unittest.UnittestProto.defaultBoolExtension;
  import static protobuf_unittest.UnittestProto.defaultBytesExtension;
  import static protobuf_unittest.UnittestProto.defaultCordExtension;
  import static protobuf_unittest.UnittestProto.defaultDoubleExtension;
  import static protobuf_unittest.UnittestProto.defaultFixed32Extension;
  import static protobuf_unittest.UnittestProto.defaultFixed64Extension;
  import static protobuf_unittest.UnittestProto.defaultFloatExtension;
  import static protobuf_unittest.UnittestProto.defaultForeignEnumExtension;
  import static protobuf_unittest.UnittestProto.defaultImportEnumExtension;
  // The static imports are to avoid 100+ char lines.  The following is roughly equivalent to
  // import static protobuf_unittest.UnittestProto.*;
  import static protobuf_unittest.UnittestProto.defaultInt32Extension;
  import static protobuf_unittest.UnittestProto.defaultInt64Extension;
  import static protobuf_unittest.UnittestProto.defaultNestedEnumExtension;
  import static protobuf_unittest.UnittestProto.defaultSfixed32Extension;
  import static protobuf_unittest.UnittestProto.defaultSfixed64Extension;
  import static protobuf_unittest.UnittestProto.defaultSint32Extension;
  import static protobuf_unittest.UnittestProto.defaultSint64Extension;
  import static protobuf_unittest.UnittestProto.defaultStringExtension;
  import static protobuf_unittest.UnittestProto.defaultStringPieceExtension;
  import static protobuf_unittest.UnittestProto.defaultUint32Extension;
  import static protobuf_unittest.UnittestProto.defaultUint64Extension;
  import static protobuf_unittest.UnittestProto.oneofBytesExtension;
  import static protobuf_unittest.UnittestProto.oneofNestedMessageExtension;
  import static protobuf_unittest.UnittestProto.oneofStringExtension;
  import static protobuf_unittest.UnittestProto.oneofUint32Extension;
  import static protobuf_unittest.UnittestProto.optionalBoolExtension;
  import static protobuf_unittest.UnittestProto.optionalBytesExtension;
  import static protobuf_unittest.UnittestProto.optionalCordExtension;
  import static protobuf_unittest.UnittestProto.optionalDoubleExtension;
  import static protobuf_unittest.UnittestProto.optionalFixed32Extension;
  import static protobuf_unittest.UnittestProto.optionalFixed64Extension;
  import static protobuf_unittest.UnittestProto.optionalFloatExtension;
  import static protobuf_unittest.UnittestProto.optionalForeignEnumExtension;
  import static protobuf_unittest.UnittestProto.optionalForeignMessageExtension;
  import static protobuf_unittest.UnittestProto.optionalGroupExtension;
  import static protobuf_unittest.UnittestProto.optionalImportEnumExtension;
  import static protobuf_unittest.UnittestProto.optionalImportMessageExtension;
  import static protobuf_unittest.UnittestProto.optionalInt32Extension;
  import static protobuf_unittest.UnittestProto.optionalInt64Extension;
  import static protobuf_unittest.UnittestProto.optionalLazyMessageExtension;
  import static protobuf_unittest.UnittestProto.optionalNestedEnumExtension;
  import static protobuf_unittest.UnittestProto.optionalNestedMessageExtension;
  import static protobuf_unittest.UnittestProto.optionalPublicImportMessageExtension;
  import static protobuf_unittest.UnittestProto.optionalSfixed32Extension;
  import static protobuf_unittest.UnittestProto.optionalSfixed64Extension;
  import static protobuf_unittest.UnittestProto.optionalSint32Extension;
  import static protobuf_unittest.UnittestProto.optionalSint64Extension;
  import static protobuf_unittest.UnittestProto.optionalStringExtension;
  import static protobuf_unittest.UnittestProto.optionalStringPieceExtension;
  import static protobuf_unittest.UnittestProto.optionalUint32Extension;
  import static protobuf_unittest.UnittestProto.optionalUint64Extension;
  import static protobuf_unittest.UnittestProto.packedBoolExtension;
  import static protobuf_unittest.UnittestProto.packedDoubleExtension;
  import static protobuf_unittest.UnittestProto.packedEnumExtension;
  import static protobuf_unittest.UnittestProto.packedFixed32Extension;
  import static protobuf_unittest.UnittestProto.packedFixed64Extension;
  import static protobuf_unittest.UnittestProto.packedFloatExtension;
  import static protobuf_unittest.UnittestProto.packedInt32Extension;
  import static protobuf_unittest.UnittestProto.packedInt64Extension;
  import static protobuf_unittest.UnittestProto.packedSfixed32Extension;
  import static protobuf_unittest.UnittestProto.packedSfixed64Extension;
  import static protobuf_unittest.UnittestProto.packedSint32Extension;
  import static protobuf_unittest.UnittestProto.packedSint64Extension;
  import static protobuf_unittest.UnittestProto.packedUint32Extension;
  import static protobuf_unittest.UnittestProto.packedUint64Extension;
  import static protobuf_unittest.UnittestProto.repeatedBoolExtension;
  import static protobuf_unittest.UnittestProto.repeatedBytesExtension;
  import static protobuf_unittest.UnittestProto.repeatedCordExtension;
  import static protobuf_unittest.UnittestProto.repeatedDoubleExtension;
  import static protobuf_unittest.UnittestProto.repeatedFixed32Extension;
  import static protobuf_unittest.UnittestProto.repeatedFixed64Extension;
  import static protobuf_unittest.UnittestProto.repeatedFloatExtension;
  import static protobuf_unittest.UnittestProto.repeatedForeignEnumExtension;
  import static protobuf_unittest.UnittestProto.repeatedForeignMessageExtension;
  import static protobuf_unittest.UnittestProto.repeatedGroupExtension;
  import static protobuf_unittest.UnittestProto.repeatedImportEnumExtension;
  import static protobuf_unittest.UnittestProto.repeatedImportMessageExtension;
  import static protobuf_unittest.UnittestProto.repeatedInt32Extension;
  import static protobuf_unittest.UnittestProto.repeatedInt64Extension;
  import static protobuf_unittest.UnittestProto.repeatedLazyMessageExtension;
  import static protobuf_unittest.UnittestProto.repeatedNestedEnumExtension;
  import static protobuf_unittest.UnittestProto.repeatedNestedMessageExtension;
  import static protobuf_unittest.UnittestProto.repeatedSfixed32Extension;
  import static protobuf_unittest.UnittestProto.repeatedSfixed64Extension;
  import static protobuf_unittest.UnittestProto.repeatedSint32Extension;
  import static protobuf_unittest.UnittestProto.repeatedSint64Extension;
  import static protobuf_unittest.UnittestProto.repeatedStringExtension;
  import static protobuf_unittest.UnittestProto.repeatedStringPieceExtension;
  import static protobuf_unittest.UnittestProto.repeatedUint32Extension;
  import static protobuf_unittest.UnittestProto.repeatedUint64Extension;
  
  import com.google.protobuf.UnittestImportLite.ImportEnumLite;
  import com.google.protobuf.UnittestLite.ForeignEnumLite;
  import com.google.protobuf.UnittestLite.TestAllExtensionsLiteOrBuilder;
  import com.google.protobuf.UnittestLite.TestAllTypesLite;
  import com.google.protobuf.UnittestLite.TestPackedExtensionsLite;
  import com.google.protobuf.test.UnittestImport.ImportEnum;
  import com.google.protobuf.test.UnittestImport.ImportMessage;
  import com.google.protobuf.test.UnittestImportPublic.PublicImportMessage;
  import protobuf_unittest.UnittestProto;
  import protobuf_unittest.UnittestProto.ForeignEnum;
  import protobuf_unittest.UnittestProto.ForeignMessage;
  import protobuf_unittest.UnittestProto.TestAllExtensions;
  import protobuf_unittest.UnittestProto.TestAllExtensionsOrBuilder;
  import protobuf_unittest.UnittestProto.TestAllTypes;
  import protobuf_unittest.UnittestProto.TestAllTypesOrBuilder;
  import protobuf_unittest.UnittestProto.TestOneof2;
  import protobuf_unittest.UnittestProto.TestPackedExtensions;
  import protobuf_unittest.UnittestProto.TestPackedTypes;
  import protobuf_unittest.UnittestProto.TestRequired;
  import protobuf_unittest.UnittestProto.TestUnpackedTypes;
  import java.io.File;
  import java.io.IOException;
  import java.io.RandomAccessFile;
  import junit.framework.Assert;
  
  /**
   * Contains methods for setting all fields of {@code TestAllTypes} to
   * some values as well as checking that all the fields are set to those values.
   * These are useful for testing various protocol message features, e.g.
   * set all fields of a message, serialize it, parse it, and check that all
   * fields are set.
   *
   * <p>This code is not to be used outside of {@code com.google.protobuf} and
   * subpackages.
   *
   * @author kenton@google.com Kenton Varda
   */
  public final class TestUtil {
    private TestUtil() {}
  
    public static final TestRequired TEST_REQUIRED_UNINITIALIZED =
        TestRequired.newBuilder().setA(1).buildPartial();
    public static final TestRequired TEST_REQUIRED_INITIALIZED =
        TestRequired.newBuilder().setA(1).setB(2).setC(3).build();
  
    /** Helper to convert a String to ByteString. */
    static ByteString toBytes(String str) {
      return ByteString.copyFrom(str.getBytes(Internal.UTF_8));
    }
  
    /**
     * Dirties the message by resetting the momoized serialized size.
     */
    public static void resetMemoizedSize(AbstractMessage message) {
      message.memoizedSize = -1;
    }
  
    /**
     * Get a {@code TestAllTypes} with all fields set as they would be by
     * {@link #setAllFields(TestAllTypes.Builder)}.
     */
    public static TestAllTypes getAllSet() {
      TestAllTypes.Builder builder = TestAllTypes.newBuilder();
      setAllFields(builder);
      return builder.build();
    }
  
    /**
     * Get a {@code TestAllTypes.Builder} with all fields set as they would be by
     * {@link #setAllFields(TestAllTypes.Builder)}.
     */
    public static TestAllTypes.Builder getAllSetBuilder() {
      TestAllTypes.Builder builder = TestAllTypes.newBuilder();
      setAllFields(builder);
      return builder;
    }
  
    /**
     * Get a {@code TestAllExtensions} with all fields set as they would be by
     * {@link #setAllExtensions(TestAllExtensions.Builder)}.
     */
    public static TestAllExtensions getAllExtensionsSet() {
      TestAllExtensions.Builder builder = TestAllExtensions.newBuilder();
      setAllExtensions(builder);
      return builder.build();
    }
  
    public static TestPackedTypes getPackedSet() {
      TestPackedTypes.Builder builder = TestPackedTypes.newBuilder();
      setPackedFields(builder);
      return builder.build();
    }
  
    public static TestUnpackedTypes getUnpackedSet() {
      TestUnpackedTypes.Builder builder = TestUnpackedTypes.newBuilder();
      setUnpackedFields(builder);
      return builder.build();
    }
  
    public static TestPackedExtensions getPackedExtensionsSet() {
      TestPackedExtensions.Builder builder = TestPackedExtensions.newBuilder();
      setPackedExtensions(builder);
      return builder.build();
    }
  
    /**
     * Set every field of {@code message} to the values expected by
     * {@code assertAllFieldsSet()}.
     */
    public static void setAllFields(TestAllTypes.Builder message) {
      message.setOptionalInt32   (101);
      message.setOptionalInt64   (102);
      message.setOptionalUint32  (103);
      message.setOptionalUint64  (104);
      message.setOptionalSint32  (105);
      message.setOptionalSint64  (106);
      message.setOptionalFixed32 (107);
      message.setOptionalFixed64 (108);
      message.setOptionalSfixed32(109);
      message.setOptionalSfixed64(110);
      message.setOptionalFloat   (111);
      message.setOptionalDouble  (112);
      message.setOptionalBool    (true);
      message.setOptionalString  ("115");
      message.setOptionalBytes   (toBytes("116"));
  
      message.setOptionalGroup(
        TestAllTypes.OptionalGroup.newBuilder().setA(117).build());
      message.setOptionalNestedMessage(
        TestAllTypes.NestedMessage.newBuilder().setBb(118).build());
      message.setOptionalForeignMessage(
        ForeignMessage.newBuilder().setC(119).build());
      message.setOptionalImportMessage(
        ImportMessage.newBuilder().setD(120).build());
      message.setOptionalPublicImportMessage(
        PublicImportMessage.newBuilder().setE(126).build());
      message.setOptionalLazyMessage(
        TestAllTypes.NestedMessage.newBuilder().setBb(127).build());
  
      message.setOptionalNestedEnum (TestAllTypes.NestedEnum.BAZ);
      message.setOptionalForeignEnum(ForeignEnum.FOREIGN_BAZ);
      message.setOptionalImportEnum (ImportEnum.IMPORT_BAZ);
  
      message.setOptionalStringPiece("124");
      message.setOptionalCord("125");
  
      // -----------------------------------------------------------------
  
      message.addRepeatedInt32   (201);
      message.addRepeatedInt64   (202);
      message.addRepeatedUint32  (203);
      message.addRepeatedUint64  (204);
      message.addRepeatedSint32  (205);
      message.addRepeatedSint64  (206);
      message.addRepeatedFixed32 (207);
      message.addRepeatedFixed64 (208);
      message.addRepeatedSfixed32(209);
      message.addRepeatedSfixed64(210);
      message.addRepeatedFloat   (211);
      message.addRepeatedDouble  (212);
      message.addRepeatedBool    (true);
      message.addRepeatedString  ("215");
      message.addRepeatedBytes   (toBytes("216"));
  
      message.addRepeatedGroup(
        TestAllTypes.RepeatedGroup.newBuilder().setA(217).build());
      message.addRepeatedNestedMessage(
        TestAllTypes.NestedMessage.newBuilder().setBb(218).build());
      message.addRepeatedForeignMessage(
        ForeignMessage.newBuilder().setC(219).build());
      message.addRepeatedImportMessage(
        ImportMessage.newBuilder().setD(220).build());
      message.addRepeatedLazyMessage(
        TestAllTypes.NestedMessage.newBuilder().setBb(227).build());
  
      message.addRepeatedNestedEnum (TestAllTypes.NestedEnum.BAR);
      message.addRepeatedForeignEnum(ForeignEnum.FOREIGN_BAR);
      message.addRepeatedImportEnum (ImportEnum.IMPORT_BAR);
  
      message.addRepeatedStringPiece("224");
      message.addRepeatedCord("225");
  
      // Add a second one of each field.
      message.addRepeatedInt32   (301);
      message.addRepeatedInt64   (302);
      message.addRepeatedUint32  (303);
      message.addRepeatedUint64  (304);
      message.addRepeatedSint32  (305);
      message.addRepeatedSint64  (306);
      message.addRepeatedFixed32 (307);
      message.addRepeatedFixed64 (308);
      message.addRepeatedSfixed32(309);
      message.addRepeatedSfixed64(310);
      message.addRepeatedFloat   (311);
      message.addRepeatedDouble  (312);
      message.addRepeatedBool    (false);
      message.addRepeatedString  ("315");
      message.addRepeatedBytes   (toBytes("316"));
  
      message.addRepeatedGroup(
        TestAllTypes.RepeatedGroup.newBuilder().setA(317).build());
      message.addRepeatedNestedMessage(
        TestAllTypes.NestedMessage.newBuilder().setBb(318).build());
      message.addRepeatedForeignMessage(
        ForeignMessage.newBuilder().setC(319).build());
      message.addRepeatedImportMessage(
        ImportMessage.newBuilder().setD(320).build());
      message.addRepeatedLazyMessage(
        TestAllTypes.NestedMessage.newBuilder().setBb(327).build());
  
      message.addRepeatedNestedEnum (TestAllTypes.NestedEnum.BAZ);
      message.addRepeatedForeignEnum(ForeignEnum.FOREIGN_BAZ);
      message.addRepeatedImportEnum (ImportEnum.IMPORT_BAZ);
  
      message.addRepeatedStringPiece("324");
      message.addRepeatedCord("325");
  
      // -----------------------------------------------------------------
  
      message.setDefaultInt32   (401);
      message.setDefaultInt64   (402);
      message.setDefaultUint32  (403);
      message.setDefaultUint64  (404);
      message.setDefaultSint32  (405);
      message.setDefaultSint64  (406);
      message.setDefaultFixed32 (407);
      message.setDefaultFixed64 (408);
      message.setDefaultSfixed32(409);
      message.setDefaultSfixed64(410);
      message.setDefaultFloat   (411);
      message.setDefaultDouble  (412);
      message.setDefaultBool    (false);
      message.setDefaultString  ("415");
      message.setDefaultBytes   (toBytes("416"));
  
      message.setDefaultNestedEnum (TestAllTypes.NestedEnum.FOO);
      message.setDefaultForeignEnum(ForeignEnum.FOREIGN_FOO);
      message.setDefaultImportEnum (ImportEnum.IMPORT_FOO);
  
      message.setDefaultStringPiece("424");
      message.setDefaultCord("425");
  
      message.setOneofUint32(601);
      message.setOneofNestedMessage(
        TestAllTypes.NestedMessage.newBuilder().setBb(602).build());
      message.setOneofString("603");
      message.setOneofBytes(toBytes("604"));
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Modify the repeated fields of {@code message} to contain the values
     * expected by {@code assertRepeatedFieldsModified()}.
     */
    public static void modifyRepeatedFields(TestAllTypes.Builder message) {
      message.setRepeatedInt32   (1, 501);
      message.setRepeatedInt64   (1, 502);
      message.setRepeatedUint32  (1, 503);
      message.setRepeatedUint64  (1, 504);
      message.setRepeatedSint32  (1, 505);
      message.setRepeatedSint64  (1, 506);
      message.setRepeatedFixed32 (1, 507);
      message.setRepeatedFixed64 (1, 508);
      message.setRepeatedSfixed32(1, 509);
      message.setRepeatedSfixed64(1, 510);
      message.setRepeatedFloat   (1, 511);
      message.setRepeatedDouble  (1, 512);
      message.setRepeatedBool    (1, true);
      message.setRepeatedString  (1, "515");
      message.setRepeatedBytes   (1, toBytes("516"));
  
      message.setRepeatedGroup(1,
        TestAllTypes.RepeatedGroup.newBuilder().setA(517).build());
      message.setRepeatedNestedMessage(1,
        TestAllTypes.NestedMessage.newBuilder().setBb(518).build());
      message.setRepeatedForeignMessage(1,
        ForeignMessage.newBuilder().setC(519).build());
      message.setRepeatedImportMessage(1,
        ImportMessage.newBuilder().setD(520).build());
      message.setRepeatedLazyMessage(1,
        TestAllTypes.NestedMessage.newBuilder().setBb(527).build());
  
      message.setRepeatedNestedEnum (1, TestAllTypes.NestedEnum.FOO);
      message.setRepeatedForeignEnum(1, ForeignEnum.FOREIGN_FOO);
      message.setRepeatedImportEnum (1, ImportEnum.IMPORT_FOO);
  
      message.setRepeatedStringPiece(1, "524");
      message.setRepeatedCord(1, "525");
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all fields of
     * {@code message} are set to the values assigned by {@code setAllFields}.
     */
    public static void assertAllFieldsSet(TestAllTypesOrBuilder message) {
      Assert.assertTrue(message.hasOptionalInt32   ());
      Assert.assertTrue(message.hasOptionalInt64   ());
      Assert.assertTrue(message.hasOptionalUint32  ());
      Assert.assertTrue(message.hasOptionalUint64  ());
      Assert.assertTrue(message.hasOptionalSint32  ());
      Assert.assertTrue(message.hasOptionalSint64  ());
      Assert.assertTrue(message.hasOptionalFixed32 ());
      Assert.assertTrue(message.hasOptionalFixed64 ());
      Assert.assertTrue(message.hasOptionalSfixed32());
      Assert.assertTrue(message.hasOptionalSfixed64());
      Assert.assertTrue(message.hasOptionalFloat   ());
      Assert.assertTrue(message.hasOptionalDouble  ());
      Assert.assertTrue(message.hasOptionalBool    ());
      Assert.assertTrue(message.hasOptionalString  ());
      Assert.assertTrue(message.hasOptionalBytes   ());
  
      Assert.assertTrue(message.hasOptionalGroup         ());
      Assert.assertTrue(message.hasOptionalNestedMessage ());
      Assert.assertTrue(message.hasOptionalForeignMessage());
      Assert.assertTrue(message.hasOptionalImportMessage ());
  
      Assert.assertTrue(message.getOptionalGroup         ().hasA());
      Assert.assertTrue(message.getOptionalNestedMessage ().hasBb());
      Assert.assertTrue(message.getOptionalForeignMessage().hasC());
      Assert.assertTrue(message.getOptionalImportMessage ().hasD());
  
      Assert.assertTrue(message.hasOptionalNestedEnum ());
      Assert.assertTrue(message.hasOptionalForeignEnum());
      Assert.assertTrue(message.hasOptionalImportEnum ());
  
      Assert.assertTrue(message.hasOptionalStringPiece());
      Assert.assertTrue(message.hasOptionalCord());
  
      Assert.assertEquals(101  , message.getOptionalInt32   ());
      Assert.assertEquals(102  , message.getOptionalInt64   ());
      Assert.assertEquals(103  , message.getOptionalUint32  ());
      Assert.assertEquals(104  , message.getOptionalUint64  ());
      Assert.assertEquals(105  , message.getOptionalSint32  ());
      Assert.assertEquals(106  , message.getOptionalSint64  ());
      Assert.assertEquals(107  , message.getOptionalFixed32 ());
      Assert.assertEquals(108  , message.getOptionalFixed64 ());
      Assert.assertEquals(109  , message.getOptionalSfixed32());
      Assert.assertEquals(110  , message.getOptionalSfixed64());
      Assert.assertEquals(111  , message.getOptionalFloat   (), 0.0);
      Assert.assertEquals(112  , message.getOptionalDouble  (), 0.0);
      Assert.assertEquals(true , message.getOptionalBool    ());
      Assert.assertEquals("115", message.getOptionalString  ());
      Assert.assertEquals(toBytes("116"), message.getOptionalBytes());
  
      Assert.assertEquals(117, message.getOptionalGroup              ().getA());
      Assert.assertEquals(118, message.getOptionalNestedMessage      ().getBb());
      Assert.assertEquals(119, message.getOptionalForeignMessage     ().getC());
      Assert.assertEquals(120, message.getOptionalImportMessage      ().getD());
      Assert.assertEquals(126, message.getOptionalPublicImportMessage().getE());
      Assert.assertEquals(127, message.getOptionalLazyMessage        ().getBb());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.BAZ, message.getOptionalNestedEnum());
      Assert.assertEquals(ForeignEnum.FOREIGN_BAZ, message.getOptionalForeignEnum());
      Assert.assertEquals(ImportEnum.IMPORT_BAZ, message.getOptionalImportEnum());
  
      Assert.assertEquals("124", message.getOptionalStringPiece());
      Assert.assertEquals("125", message.getOptionalCord());
  
      // -----------------------------------------------------------------
  
      Assert.assertEquals(2, message.getRepeatedInt32Count   ());
      Assert.assertEquals(2, message.getRepeatedInt64Count   ());
      Assert.assertEquals(2, message.getRepeatedUint32Count  ());
      Assert.assertEquals(2, message.getRepeatedUint64Count  ());
      Assert.assertEquals(2, message.getRepeatedSint32Count  ());
      Assert.assertEquals(2, message.getRepeatedSint64Count  ());
      Assert.assertEquals(2, message.getRepeatedFixed32Count ());
      Assert.assertEquals(2, message.getRepeatedFixed64Count ());
      Assert.assertEquals(2, message.getRepeatedSfixed32Count());
      Assert.assertEquals(2, message.getRepeatedSfixed64Count());
      Assert.assertEquals(2, message.getRepeatedFloatCount   ());
      Assert.assertEquals(2, message.getRepeatedDoubleCount  ());
      Assert.assertEquals(2, message.getRepeatedBoolCount    ());
      Assert.assertEquals(2, message.getRepeatedStringCount  ());
      Assert.assertEquals(2, message.getRepeatedBytesCount   ());
  
      Assert.assertEquals(2, message.getRepeatedGroupCount         ());
      Assert.assertEquals(2, message.getRepeatedNestedMessageCount ());
      Assert.assertEquals(2, message.getRepeatedForeignMessageCount());
      Assert.assertEquals(2, message.getRepeatedImportMessageCount ());
      Assert.assertEquals(2, message.getRepeatedLazyMessageCount   ());
      Assert.assertEquals(2, message.getRepeatedNestedEnumCount    ());
      Assert.assertEquals(2, message.getRepeatedForeignEnumCount   ());
      Assert.assertEquals(2, message.getRepeatedImportEnumCount    ());
  
      Assert.assertEquals(2, message.getRepeatedStringPieceCount());
      Assert.assertEquals(2, message.getRepeatedCordCount());
  
      Assert.assertEquals(201  , message.getRepeatedInt32   (0));
      Assert.assertEquals(202  , message.getRepeatedInt64   (0));
      Assert.assertEquals(203  , message.getRepeatedUint32  (0));
      Assert.assertEquals(204  , message.getRepeatedUint64  (0));
      Assert.assertEquals(205  , message.getRepeatedSint32  (0));
      Assert.assertEquals(206  , message.getRepeatedSint64  (0));
      Assert.assertEquals(207  , message.getRepeatedFixed32 (0));
      Assert.assertEquals(208  , message.getRepeatedFixed64 (0));
      Assert.assertEquals(209  , message.getRepeatedSfixed32(0));
      Assert.assertEquals(210  , message.getRepeatedSfixed64(0));
      Assert.assertEquals(211  , message.getRepeatedFloat   (0), 0.0);
      Assert.assertEquals(212  , message.getRepeatedDouble  (0), 0.0);
      Assert.assertEquals(true , message.getRepeatedBool    (0));
      Assert.assertEquals("215", message.getRepeatedString  (0));
      Assert.assertEquals(toBytes("216"), message.getRepeatedBytes(0));
  
      Assert.assertEquals(217, message.getRepeatedGroup         (0).getA());
      Assert.assertEquals(218, message.getRepeatedNestedMessage (0).getBb());
      Assert.assertEquals(219, message.getRepeatedForeignMessage(0).getC());
      Assert.assertEquals(220, message.getRepeatedImportMessage (0).getD());
      Assert.assertEquals(227, message.getRepeatedLazyMessage   (0).getBb());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.BAR, message.getRepeatedNestedEnum (0));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAR, message.getRepeatedForeignEnum(0));
      Assert.assertEquals(ImportEnum.IMPORT_BAR, message.getRepeatedImportEnum(0));
  
      Assert.assertEquals("224", message.getRepeatedStringPiece(0));
      Assert.assertEquals("225", message.getRepeatedCord(0));
  
      Assert.assertEquals(301  , message.getRepeatedInt32   (1));
      Assert.assertEquals(302  , message.getRepeatedInt64   (1));
      Assert.assertEquals(303  , message.getRepeatedUint32  (1));
      Assert.assertEquals(304  , message.getRepeatedUint64  (1));
      Assert.assertEquals(305  , message.getRepeatedSint32  (1));
      Assert.assertEquals(306  , message.getRepeatedSint64  (1));
      Assert.assertEquals(307  , message.getRepeatedFixed32 (1));
      Assert.assertEquals(308  , message.getRepeatedFixed64 (1));
      Assert.assertEquals(309  , message.getRepeatedSfixed32(1));
      Assert.assertEquals(310  , message.getRepeatedSfixed64(1));
      Assert.assertEquals(311  , message.getRepeatedFloat   (1), 0.0);
      Assert.assertEquals(312  , message.getRepeatedDouble  (1), 0.0);
      Assert.assertEquals(false, message.getRepeatedBool    (1));
      Assert.assertEquals("315", message.getRepeatedString  (1));
      Assert.assertEquals(toBytes("316"), message.getRepeatedBytes(1));
  
      Assert.assertEquals(317, message.getRepeatedGroup         (1).getA());
      Assert.assertEquals(318, message.getRepeatedNestedMessage (1).getBb());
      Assert.assertEquals(319, message.getRepeatedForeignMessage(1).getC());
      Assert.assertEquals(320, message.getRepeatedImportMessage (1).getD());
      Assert.assertEquals(327, message.getRepeatedLazyMessage   (1).getBb());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.BAZ, message.getRepeatedNestedEnum (1));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAZ, message.getRepeatedForeignEnum(1));
      Assert.assertEquals(ImportEnum.IMPORT_BAZ, message.getRepeatedImportEnum(1));
  
      Assert.assertEquals("324", message.getRepeatedStringPiece(1));
      Assert.assertEquals("325", message.getRepeatedCord(1));
  
      // -----------------------------------------------------------------
  
      Assert.assertTrue(message.hasDefaultInt32   ());
      Assert.assertTrue(message.hasDefaultInt64   ());
      Assert.assertTrue(message.hasDefaultUint32  ());
      Assert.assertTrue(message.hasDefaultUint64  ());
      Assert.assertTrue(message.hasDefaultSint32  ());
      Assert.assertTrue(message.hasDefaultSint64  ());
      Assert.assertTrue(message.hasDefaultFixed32 ());
      Assert.assertTrue(message.hasDefaultFixed64 ());
      Assert.assertTrue(message.hasDefaultSfixed32());
      Assert.assertTrue(message.hasDefaultSfixed64());
      Assert.assertTrue(message.hasDefaultFloat   ());
      Assert.assertTrue(message.hasDefaultDouble  ());
      Assert.assertTrue(message.hasDefaultBool    ());
      Assert.assertTrue(message.hasDefaultString  ());
      Assert.assertTrue(message.hasDefaultBytes   ());
  
      Assert.assertTrue(message.hasDefaultNestedEnum ());
      Assert.assertTrue(message.hasDefaultForeignEnum());
      Assert.assertTrue(message.hasDefaultImportEnum ());
  
      Assert.assertTrue(message.hasDefaultStringPiece());
      Assert.assertTrue(message.hasDefaultCord());
  
      Assert.assertEquals(401  , message.getDefaultInt32   ());
      Assert.assertEquals(402  , message.getDefaultInt64   ());
      Assert.assertEquals(403  , message.getDefaultUint32  ());
      Assert.assertEquals(404  , message.getDefaultUint64  ());
      Assert.assertEquals(405  , message.getDefaultSint32  ());
      Assert.assertEquals(406  , message.getDefaultSint64  ());
      Assert.assertEquals(407  , message.getDefaultFixed32 ());
      Assert.assertEquals(408  , message.getDefaultFixed64 ());
      Assert.assertEquals(409  , message.getDefaultSfixed32());
      Assert.assertEquals(410  , message.getDefaultSfixed64());
      Assert.assertEquals(411  , message.getDefaultFloat   (), 0.0);
      Assert.assertEquals(412  , message.getDefaultDouble  (), 0.0);
      Assert.assertEquals(false, message.getDefaultBool    ());
      Assert.assertEquals("415", message.getDefaultString  ());
      Assert.assertEquals(toBytes("416"), message.getDefaultBytes());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.FOO, message.getDefaultNestedEnum ());
      Assert.assertEquals(ForeignEnum.FOREIGN_FOO, message.getDefaultForeignEnum());
      Assert.assertEquals(ImportEnum.IMPORT_FOO, message.getDefaultImportEnum());
  
      Assert.assertEquals("424", message.getDefaultStringPiece());
      Assert.assertEquals("425", message.getDefaultCord());
  
      Assert.assertEquals(TestAllTypes.OneofFieldCase.ONEOF_BYTES, message.getOneofFieldCase());
      Assert.assertFalse(message.hasOneofUint32());
      Assert.assertFalse(message.hasOneofNestedMessage());
      Assert.assertFalse(message.hasOneofString());
      Assert.assertTrue(message.hasOneofBytes());
  
      Assert.assertEquals(toBytes("604"), message.getOneofBytes());
    }
  
    // -------------------------------------------------------------------
    /**
     * Assert (using {@code junit.framework.Assert}} that all fields of
     * {@code message} are cleared, and that getting the fields returns their
     * default values.
     */
    public static void assertClear(TestAllTypesOrBuilder message) {
      // hasBlah() should initially be false for all optional fields.
      Assert.assertFalse(message.hasOptionalInt32   ());
      Assert.assertFalse(message.hasOptionalInt64   ());
      Assert.assertFalse(message.hasOptionalUint32  ());
      Assert.assertFalse(message.hasOptionalUint64  ());
      Assert.assertFalse(message.hasOptionalSint32  ());
      Assert.assertFalse(message.hasOptionalSint64  ());
      Assert.assertFalse(message.hasOptionalFixed32 ());
      Assert.assertFalse(message.hasOptionalFixed64 ());
      Assert.assertFalse(message.hasOptionalSfixed32());
      Assert.assertFalse(message.hasOptionalSfixed64());
      Assert.assertFalse(message.hasOptionalFloat   ());
      Assert.assertFalse(message.hasOptionalDouble  ());
      Assert.assertFalse(message.hasOptionalBool    ());
      Assert.assertFalse(message.hasOptionalString  ());
      Assert.assertFalse(message.hasOptionalBytes   ());
  
      Assert.assertFalse(message.hasOptionalGroup         ());
      Assert.assertFalse(message.hasOptionalNestedMessage ());
      Assert.assertFalse(message.hasOptionalForeignMessage());
      Assert.assertFalse(message.hasOptionalImportMessage ());
  
      Assert.assertFalse(message.hasOptionalNestedEnum ());
      Assert.assertFalse(message.hasOptionalForeignEnum());
      Assert.assertFalse(message.hasOptionalImportEnum ());
  
      Assert.assertFalse(message.hasOptionalStringPiece());
      Assert.assertFalse(message.hasOptionalCord());
  
      // Optional fields without defaults are set to zero or something like it.
      Assert.assertEquals(0    , message.getOptionalInt32   ());
      Assert.assertEquals(0    , message.getOptionalInt64   ());
      Assert.assertEquals(0    , message.getOptionalUint32  ());
      Assert.assertEquals(0    , message.getOptionalUint64  ());
      Assert.assertEquals(0    , message.getOptionalSint32  ());
      Assert.assertEquals(0    , message.getOptionalSint64  ());
      Assert.assertEquals(0    , message.getOptionalFixed32 ());
      Assert.assertEquals(0    , message.getOptionalFixed64 ());
      Assert.assertEquals(0    , message.getOptionalSfixed32());
      Assert.assertEquals(0    , message.getOptionalSfixed64());
      Assert.assertEquals(0    , message.getOptionalFloat   (), 0.0);
      Assert.assertEquals(0    , message.getOptionalDouble  (), 0.0);
      Assert.assertEquals(false, message.getOptionalBool    ());
      Assert.assertEquals(""   , message.getOptionalString  ());
      Assert.assertEquals(ByteString.EMPTY, message.getOptionalBytes());
  
      // Embedded messages should also be clear.
      Assert.assertFalse(message.getOptionalGroup              ().hasA());
      Assert.assertFalse(message.getOptionalNestedMessage      ().hasBb());
      Assert.assertFalse(message.getOptionalForeignMessage     ().hasC());
      Assert.assertFalse(message.getOptionalImportMessage      ().hasD());
      Assert.assertFalse(message.getOptionalPublicImportMessage().hasE());
      Assert.assertFalse(message.getOptionalLazyMessage        ().hasBb());
  
      Assert.assertEquals(0, message.getOptionalGroup              ().getA());
      Assert.assertEquals(0, message.getOptionalNestedMessage      ().getBb());
      Assert.assertEquals(0, message.getOptionalForeignMessage     ().getC());
      Assert.assertEquals(0, message.getOptionalImportMessage      ().getD());
      Assert.assertEquals(0, message.getOptionalPublicImportMessage().getE());
      Assert.assertEquals(0, message.getOptionalLazyMessage        ().getBb());
  
      // Enums without defaults are set to the first value in the enum.
      Assert.assertEquals(TestAllTypes.NestedEnum.FOO, message.getOptionalNestedEnum ());
      Assert.assertEquals(ForeignEnum.FOREIGN_FOO, message.getOptionalForeignEnum());
      Assert.assertEquals(ImportEnum.IMPORT_FOO, message.getOptionalImportEnum());
  
      Assert.assertEquals("", message.getOptionalStringPiece());
      Assert.assertEquals("", message.getOptionalCord());
  
      // Repeated fields are empty.
      Assert.assertEquals(0, message.getRepeatedInt32Count   ());
      Assert.assertEquals(0, message.getRepeatedInt64Count   ());
      Assert.assertEquals(0, message.getRepeatedUint32Count  ());
      Assert.assertEquals(0, message.getRepeatedUint64Count  ());
      Assert.assertEquals(0, message.getRepeatedSint32Count  ());
      Assert.assertEquals(0, message.getRepeatedSint64Count  ());
      Assert.assertEquals(0, message.getRepeatedFixed32Count ());
      Assert.assertEquals(0, message.getRepeatedFixed64Count ());
      Assert.assertEquals(0, message.getRepeatedSfixed32Count());
      Assert.assertEquals(0, message.getRepeatedSfixed64Count());
      Assert.assertEquals(0, message.getRepeatedFloatCount   ());
      Assert.assertEquals(0, message.getRepeatedDoubleCount  ());
      Assert.assertEquals(0, message.getRepeatedBoolCount    ());
      Assert.assertEquals(0, message.getRepeatedStringCount  ());
      Assert.assertEquals(0, message.getRepeatedBytesCount   ());
  
      Assert.assertEquals(0, message.getRepeatedGroupCount         ());
      Assert.assertEquals(0, message.getRepeatedNestedMessageCount ());
      Assert.assertEquals(0, message.getRepeatedForeignMessageCount());
      Assert.assertEquals(0, message.getRepeatedImportMessageCount ());
      Assert.assertEquals(0, message.getRepeatedLazyMessageCount   ());
      Assert.assertEquals(0, message.getRepeatedNestedEnumCount    ());
      Assert.assertEquals(0, message.getRepeatedForeignEnumCount   ());
      Assert.assertEquals(0, message.getRepeatedImportEnumCount    ());
  
      Assert.assertEquals(0, message.getRepeatedStringPieceCount());
      Assert.assertEquals(0, message.getRepeatedCordCount());
  
      // hasBlah() should also be false for all default fields.
      Assert.assertFalse(message.hasDefaultInt32   ());
      Assert.assertFalse(message.hasDefaultInt64   ());
      Assert.assertFalse(message.hasDefaultUint32  ());
      Assert.assertFalse(message.hasDefaultUint64  ());
      Assert.assertFalse(message.hasDefaultSint32  ());
      Assert.assertFalse(message.hasDefaultSint64  ());
      Assert.assertFalse(message.hasDefaultFixed32 ());
      Assert.assertFalse(message.hasDefaultFixed64 ());
      Assert.assertFalse(message.hasDefaultSfixed32());
      Assert.assertFalse(message.hasDefaultSfixed64());
      Assert.assertFalse(message.hasDefaultFloat   ());
      Assert.assertFalse(message.hasDefaultDouble  ());
      Assert.assertFalse(message.hasDefaultBool    ());
      Assert.assertFalse(message.hasDefaultString  ());
      Assert.assertFalse(message.hasDefaultBytes   ());
  
      Assert.assertFalse(message.hasDefaultNestedEnum ());
      Assert.assertFalse(message.hasDefaultForeignEnum());
      Assert.assertFalse(message.hasDefaultImportEnum ());
  
      Assert.assertFalse(message.hasDefaultStringPiece());
      Assert.assertFalse(message.hasDefaultCord());
  
      // Fields with defaults have their default values (duh).
      Assert.assertEquals( 41    , message.getDefaultInt32   ());
      Assert.assertEquals( 42    , message.getDefaultInt64   ());
      Assert.assertEquals( 43    , message.getDefaultUint32  ());
      Assert.assertEquals( 44    , message.getDefaultUint64  ());
      Assert.assertEquals(-45    , message.getDefaultSint32  ());
      Assert.assertEquals( 46    , message.getDefaultSint64  ());
      Assert.assertEquals( 47    , message.getDefaultFixed32 ());
      Assert.assertEquals( 48    , message.getDefaultFixed64 ());
      Assert.assertEquals( 49    , message.getDefaultSfixed32());
      Assert.assertEquals(-50    , message.getDefaultSfixed64());
      Assert.assertEquals( 51.5  , message.getDefaultFloat   (), 0.0);
      Assert.assertEquals( 52e3  , message.getDefaultDouble  (), 0.0);
      Assert.assertEquals(true   , message.getDefaultBool    ());
      Assert.assertEquals("hello", message.getDefaultString  ());
      Assert.assertEquals(toBytes("world"), message.getDefaultBytes());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.BAR, message.getDefaultNestedEnum ());
      Assert.assertEquals(ForeignEnum.FOREIGN_BAR, message.getDefaultForeignEnum());
      Assert.assertEquals(ImportEnum.IMPORT_BAR, message.getDefaultImportEnum());
  
      Assert.assertEquals("abc", message.getDefaultStringPiece());
      Assert.assertEquals("123", message.getDefaultCord());
  
      Assert.assertFalse(message.hasOneofUint32());
      Assert.assertFalse(message.hasOneofNestedMessage());
      Assert.assertFalse(message.hasOneofString());
      Assert.assertFalse(message.hasOneofBytes());
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all fields of
     * {@code message} are set to the values assigned by {@code setAllFields}
     * followed by {@code modifyRepeatedFields}.
     */
    public static void assertRepeatedFieldsModified(
        TestAllTypesOrBuilder message) {
      // ModifyRepeatedFields only sets the second repeated element of each
      // field.  In addition to verifying this, we also verify that the first
      // element and size were *not* modified.
      Assert.assertEquals(2, message.getRepeatedInt32Count   ());
      Assert.assertEquals(2, message.getRepeatedInt64Count   ());
      Assert.assertEquals(2, message.getRepeatedUint32Count  ());
      Assert.assertEquals(2, message.getRepeatedUint64Count  ());
      Assert.assertEquals(2, message.getRepeatedSint32Count  ());
      Assert.assertEquals(2, message.getRepeatedSint64Count  ());
      Assert.assertEquals(2, message.getRepeatedFixed32Count ());
      Assert.assertEquals(2, message.getRepeatedFixed64Count ());
      Assert.assertEquals(2, message.getRepeatedSfixed32Count());
      Assert.assertEquals(2, message.getRepeatedSfixed64Count());
      Assert.assertEquals(2, message.getRepeatedFloatCount   ());
      Assert.assertEquals(2, message.getRepeatedDoubleCount  ());
      Assert.assertEquals(2, message.getRepeatedBoolCount    ());
      Assert.assertEquals(2, message.getRepeatedStringCount  ());
      Assert.assertEquals(2, message.getRepeatedBytesCount   ());
  
      Assert.assertEquals(2, message.getRepeatedGroupCount         ());
      Assert.assertEquals(2, message.getRepeatedNestedMessageCount ());
      Assert.assertEquals(2, message.getRepeatedForeignMessageCount());
      Assert.assertEquals(2, message.getRepeatedImportMessageCount ());
      Assert.assertEquals(2, message.getRepeatedLazyMessageCount   ());
      Assert.assertEquals(2, message.getRepeatedNestedEnumCount    ());
      Assert.assertEquals(2, message.getRepeatedForeignEnumCount   ());
      Assert.assertEquals(2, message.getRepeatedImportEnumCount    ());
  
      Assert.assertEquals(2, message.getRepeatedStringPieceCount());
      Assert.assertEquals(2, message.getRepeatedCordCount());
  
      Assert.assertEquals(201  , message.getRepeatedInt32   (0));
      Assert.assertEquals(202L , message.getRepeatedInt64   (0));
      Assert.assertEquals(203  , message.getRepeatedUint32  (0));
      Assert.assertEquals(204L , message.getRepeatedUint64  (0));
      Assert.assertEquals(205  , message.getRepeatedSint32  (0));
      Assert.assertEquals(206L , message.getRepeatedSint64  (0));
      Assert.assertEquals(207  , message.getRepeatedFixed32 (0));
      Assert.assertEquals(208L , message.getRepeatedFixed64 (0));
      Assert.assertEquals(209  , message.getRepeatedSfixed32(0));
      Assert.assertEquals(210L , message.getRepeatedSfixed64(0));
      Assert.assertEquals(211F , message.getRepeatedFloat   (0));
      Assert.assertEquals(212D , message.getRepeatedDouble  (0));
      Assert.assertEquals(true , message.getRepeatedBool    (0));
      Assert.assertEquals("215", message.getRepeatedString  (0));
      Assert.assertEquals(toBytes("216"), message.getRepeatedBytes(0));
  
      Assert.assertEquals(217, message.getRepeatedGroup         (0).getA());
      Assert.assertEquals(218, message.getRepeatedNestedMessage (0).getBb());
      Assert.assertEquals(219, message.getRepeatedForeignMessage(0).getC());
      Assert.assertEquals(220, message.getRepeatedImportMessage (0).getD());
      Assert.assertEquals(227, message.getRepeatedLazyMessage   (0).getBb());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.BAR, message.getRepeatedNestedEnum (0));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAR, message.getRepeatedForeignEnum(0));
      Assert.assertEquals(ImportEnum.IMPORT_BAR, message.getRepeatedImportEnum(0));
  
      Assert.assertEquals("224", message.getRepeatedStringPiece(0));
      Assert.assertEquals("225", message.getRepeatedCord(0));
  
      // Actually verify the second (modified) elements now.
      Assert.assertEquals(501  , message.getRepeatedInt32   (1));
      Assert.assertEquals(502L , message.getRepeatedInt64   (1));
      Assert.assertEquals(503  , message.getRepeatedUint32  (1));
      Assert.assertEquals(504L , message.getRepeatedUint64  (1));
      Assert.assertEquals(505  , message.getRepeatedSint32  (1));
      Assert.assertEquals(506L , message.getRepeatedSint64  (1));
      Assert.assertEquals(507  , message.getRepeatedFixed32 (1));
      Assert.assertEquals(508L , message.getRepeatedFixed64 (1));
      Assert.assertEquals(509  , message.getRepeatedSfixed32(1));
      Assert.assertEquals(510L , message.getRepeatedSfixed64(1));
      Assert.assertEquals(511F , message.getRepeatedFloat   (1));
      Assert.assertEquals(512D , message.getRepeatedDouble  (1));
      Assert.assertEquals(true , message.getRepeatedBool    (1));
      Assert.assertEquals("515", message.getRepeatedString  (1));
      Assert.assertEquals(toBytes("516"), message.getRepeatedBytes(1));
  
      Assert.assertEquals(517, message.getRepeatedGroup         (1).getA());
      Assert.assertEquals(518, message.getRepeatedNestedMessage (1).getBb());
      Assert.assertEquals(519, message.getRepeatedForeignMessage(1).getC());
      Assert.assertEquals(520, message.getRepeatedImportMessage (1).getD());
      Assert.assertEquals(527, message.getRepeatedLazyMessage   (1).getBb());
  
      Assert.assertEquals(TestAllTypes.NestedEnum.FOO, message.getRepeatedNestedEnum (1));
      Assert.assertEquals(ForeignEnum.FOREIGN_FOO, message.getRepeatedForeignEnum(1));
      Assert.assertEquals(ImportEnum.IMPORT_FOO, message.getRepeatedImportEnum(1));
  
      Assert.assertEquals("524", message.getRepeatedStringPiece(1));
      Assert.assertEquals("525", message.getRepeatedCord(1));
    }
  
    /**
     * Set every field of {@code message} to a unique value.
     */
    public static void setPackedFields(TestPackedTypes.Builder message) {
      message.addPackedInt32   (601);
      message.addPackedInt64   (602);
      message.addPackedUint32  (603);
      message.addPackedUint64  (604);
      message.addPackedSint32  (605);
      message.addPackedSint64  (606);
      message.addPackedFixed32 (607);
      message.addPackedFixed64 (608);
      message.addPackedSfixed32(609);
      message.addPackedSfixed64(610);
      message.addPackedFloat   (611);
      message.addPackedDouble  (612);
      message.addPackedBool    (true);
      message.addPackedEnum    (ForeignEnum.FOREIGN_BAR);
      // Add a second one of each field.
      message.addPackedInt32   (701);
      message.addPackedInt64   (702);
      message.addPackedUint32  (703);
      message.addPackedUint64  (704);
      message.addPackedSint32  (705);
      message.addPackedSint64  (706);
      message.addPackedFixed32 (707);
      message.addPackedFixed64 (708);
      message.addPackedSfixed32(709);
      message.addPackedSfixed64(710);
      message.addPackedFloat   (711);
      message.addPackedDouble  (712);
      message.addPackedBool    (false);
      message.addPackedEnum    (ForeignEnum.FOREIGN_BAZ);
    }
  
    /**
     * Set every field of {@code message} to a unique value. Must correspond with
     * the values applied by {@code setPackedFields}.
     */
    public static void setUnpackedFields(TestUnpackedTypes.Builder message) {
      message.addUnpackedInt32   (601);
      message.addUnpackedInt64   (602);
      message.addUnpackedUint32  (603);
      message.addUnpackedUint64  (604);
      message.addUnpackedSint32  (605);
      message.addUnpackedSint64  (606);
      message.addUnpackedFixed32 (607);
      message.addUnpackedFixed64 (608);
      message.addUnpackedSfixed32(609);
      message.addUnpackedSfixed64(610);
      message.addUnpackedFloat   (611);
      message.addUnpackedDouble  (612);
      message.addUnpackedBool    (true);
      message.addUnpackedEnum    (ForeignEnum.FOREIGN_BAR);
      // Add a second one of each field.
      message.addUnpackedInt32   (701);
      message.addUnpackedInt64   (702);
      message.addUnpackedUint32  (703);
      message.addUnpackedUint64  (704);
      message.addUnpackedSint32  (705);
      message.addUnpackedSint64  (706);
      message.addUnpackedFixed32 (707);
      message.addUnpackedFixed64 (708);
      message.addUnpackedSfixed32(709);
      message.addUnpackedSfixed64(710);
      message.addUnpackedFloat   (711);
      message.addUnpackedDouble  (712);
      message.addUnpackedBool    (false);
      message.addUnpackedEnum    (ForeignEnum.FOREIGN_BAZ);
    }
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all fields of
     * {@code message} are set to the values assigned by {@code setPackedFields}.
     */
    public static void assertPackedFieldsSet(TestPackedTypes message) {
      Assert.assertEquals(2, message.getPackedInt32Count   ());
      Assert.assertEquals(2, message.getPackedInt64Count   ());
      Assert.assertEquals(2, message.getPackedUint32Count  ());
      Assert.assertEquals(2, message.getPackedUint64Count  ());
      Assert.assertEquals(2, message.getPackedSint32Count  ());
      Assert.assertEquals(2, message.getPackedSint64Count  ());
      Assert.assertEquals(2, message.getPackedFixed32Count ());
      Assert.assertEquals(2, message.getPackedFixed64Count ());
      Assert.assertEquals(2, message.getPackedSfixed32Count());
      Assert.assertEquals(2, message.getPackedSfixed64Count());
      Assert.assertEquals(2, message.getPackedFloatCount   ());
      Assert.assertEquals(2, message.getPackedDoubleCount  ());
      Assert.assertEquals(2, message.getPackedBoolCount    ());
      Assert.assertEquals(2, message.getPackedEnumCount   ());
      Assert.assertEquals(601  , message.getPackedInt32   (0));
      Assert.assertEquals(602  , message.getPackedInt64   (0));
      Assert.assertEquals(603  , message.getPackedUint32  (0));
      Assert.assertEquals(604  , message.getPackedUint64  (0));
      Assert.assertEquals(605  , message.getPackedSint32  (0));
      Assert.assertEquals(606  , message.getPackedSint64  (0));
      Assert.assertEquals(607  , message.getPackedFixed32 (0));
      Assert.assertEquals(608  , message.getPackedFixed64 (0));
      Assert.assertEquals(609  , message.getPackedSfixed32(0));
      Assert.assertEquals(610  , message.getPackedSfixed64(0));
      Assert.assertEquals(611  , message.getPackedFloat   (0), 0.0);
      Assert.assertEquals(612  , message.getPackedDouble  (0), 0.0);
      Assert.assertEquals(true , message.getPackedBool    (0));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAR, message.getPackedEnum(0));
      Assert.assertEquals(701  , message.getPackedInt32   (1));
      Assert.assertEquals(702  , message.getPackedInt64   (1));
      Assert.assertEquals(703  , message.getPackedUint32  (1));
      Assert.assertEquals(704  , message.getPackedUint64  (1));
      Assert.assertEquals(705  , message.getPackedSint32  (1));
      Assert.assertEquals(706  , message.getPackedSint64  (1));
      Assert.assertEquals(707  , message.getPackedFixed32 (1));
      Assert.assertEquals(708  , message.getPackedFixed64 (1));
      Assert.assertEquals(709  , message.getPackedSfixed32(1));
      Assert.assertEquals(710  , message.getPackedSfixed64(1));
      Assert.assertEquals(711  , message.getPackedFloat   (1), 0.0);
      Assert.assertEquals(712  , message.getPackedDouble  (1), 0.0);
      Assert.assertEquals(false, message.getPackedBool    (1));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAZ, message.getPackedEnum(1));
    }
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all fields of
     * {@code message} are set to the values assigned by {@code setUnpackedFields}.
     */
    public static void assertUnpackedFieldsSet(TestUnpackedTypes message) {
      Assert.assertEquals(2, message.getUnpackedInt32Count   ());
      Assert.assertEquals(2, message.getUnpackedInt64Count   ());
      Assert.assertEquals(2, message.getUnpackedUint32Count  ());
      Assert.assertEquals(2, message.getUnpackedUint64Count  ());
      Assert.assertEquals(2, message.getUnpackedSint32Count  ());
      Assert.assertEquals(2, message.getUnpackedSint64Count  ());
      Assert.assertEquals(2, message.getUnpackedFixed32Count ());
      Assert.assertEquals(2, message.getUnpackedFixed64Count ());
      Assert.assertEquals(2, message.getUnpackedSfixed32Count());
      Assert.assertEquals(2, message.getUnpackedSfixed64Count());
      Assert.assertEquals(2, message.getUnpackedFloatCount   ());
      Assert.assertEquals(2, message.getUnpackedDoubleCount  ());
      Assert.assertEquals(2, message.getUnpackedBoolCount    ());
      Assert.assertEquals(2, message.getUnpackedEnumCount   ());
      Assert.assertEquals(601  , message.getUnpackedInt32   (0));
      Assert.assertEquals(602  , message.getUnpackedInt64   (0));
      Assert.assertEquals(603  , message.getUnpackedUint32  (0));
      Assert.assertEquals(604  , message.getUnpackedUint64  (0));
      Assert.assertEquals(605  , message.getUnpackedSint32  (0));
      Assert.assertEquals(606  , message.getUnpackedSint64  (0));
      Assert.assertEquals(607  , message.getUnpackedFixed32 (0));
      Assert.assertEquals(608  , message.getUnpackedFixed64 (0));
      Assert.assertEquals(609  , message.getUnpackedSfixed32(0));
      Assert.assertEquals(610  , message.getUnpackedSfixed64(0));
      Assert.assertEquals(611  , message.getUnpackedFloat   (0), 0.0);
      Assert.assertEquals(612  , message.getUnpackedDouble  (0), 0.0);
      Assert.assertEquals(true , message.getUnpackedBool    (0));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAR, message.getUnpackedEnum(0));
      Assert.assertEquals(701  , message.getUnpackedInt32   (1));
      Assert.assertEquals(702  , message.getUnpackedInt64   (1));
      Assert.assertEquals(703  , message.getUnpackedUint32  (1));
      Assert.assertEquals(704  , message.getUnpackedUint64  (1));
      Assert.assertEquals(705  , message.getUnpackedSint32  (1));
      Assert.assertEquals(706  , message.getUnpackedSint64  (1));
      Assert.assertEquals(707  , message.getUnpackedFixed32 (1));
      Assert.assertEquals(708  , message.getUnpackedFixed64 (1));
      Assert.assertEquals(709  , message.getUnpackedSfixed32(1));
      Assert.assertEquals(710  , message.getUnpackedSfixed64(1));
      Assert.assertEquals(711  , message.getUnpackedFloat   (1), 0.0);
      Assert.assertEquals(712  , message.getUnpackedDouble  (1), 0.0);
      Assert.assertEquals(false, message.getUnpackedBool    (1));
      Assert.assertEquals(ForeignEnum.FOREIGN_BAZ, message.getUnpackedEnum(1));
    }
  
    // ===================================================================
    // Like above, but for extensions
  
    // Java gets confused with things like assertEquals(int, Integer):  it can't
    // decide whether to call assertEquals(int, int) or assertEquals(Object,
    // Object).  So we define these methods to help it.
    private static void assertEqualsExactType(int a, int b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(long a, long b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(float a, float b) {
      Assert.assertEquals(a, b, 0.0);
    }
    private static void assertEqualsExactType(double a, double b) {
      Assert.assertEquals(a, b, 0.0);
    }
    private static void assertEqualsExactType(boolean a, boolean b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(String a, String b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(ByteString a, ByteString b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(TestAllTypes.NestedEnum a,
                                              TestAllTypes.NestedEnum b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(ForeignEnum a, ForeignEnum b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(ImportEnum a, ImportEnum b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(TestAllTypesLite.NestedEnum a,
                                              TestAllTypesLite.NestedEnum b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(ForeignEnumLite a,
                                              ForeignEnumLite b) {
      Assert.assertEquals(a, b);
    }
    private static void assertEqualsExactType(ImportEnumLite a,
                                              ImportEnumLite b) {
      Assert.assertEquals(a, b);
    }
  
    /**
     * Get an unmodifiable {@link ExtensionRegistry} containing all the
     * extensions of {@code TestAllExtensions}.
     */
    public static ExtensionRegistry getExtensionRegistry() {
      ExtensionRegistry registry = ExtensionRegistry.newInstance();
      registerAllExtensions(registry);
      return registry.getUnmodifiable();
    }
  
    /**
     * Register all of {@code TestAllExtensions}'s extensions with the
     * given {@link ExtensionRegistry}.
     */
    public static void registerAllExtensions(ExtensionRegistry registry) {
      UnittestProto.registerAllExtensions(registry);
      TestUtilLite.registerAllExtensionsLite(registry);
    }
  
    /**
     * Set every field of {@code message} to the values expected by
     * {@code assertAllExtensionsSet()}.
     */
    public static void setAllExtensions(TestAllExtensions.Builder message) {
      message.setExtension(optionalInt32Extension   , 101);
      message.setExtension(optionalInt64Extension   , 102L);
      message.setExtension(optionalUint32Extension  , 103);
      message.setExtension(optionalUint64Extension  , 104L);
      message.setExtension(optionalSint32Extension  , 105);
      message.setExtension(optionalSint64Extension  , 106L);
      message.setExtension(optionalFixed32Extension , 107);
      message.setExtension(optionalFixed64Extension , 108L);
      message.setExtension(optionalSfixed32Extension, 109);
      message.setExtension(optionalSfixed64Extension, 110L);
      message.setExtension(optionalFloatExtension   , 111F);
      message.setExtension(optionalDoubleExtension  , 112D);
      message.setExtension(optionalBoolExtension    , true);
      message.setExtension(optionalStringExtension  , "115");
      message.setExtension(optionalBytesExtension   , toBytes("116"));
  
      message.setExtension(optionalGroupExtension,
        OptionalGroup_extension.newBuilder().setA(117).build());
      message.setExtension(optionalNestedMessageExtension,
        TestAllTypes.NestedMessage.newBuilder().setBb(118).build());
      message.setExtension(optionalForeignMessageExtension,
        ForeignMessage.newBuilder().setC(119).build());
      message.setExtension(optionalImportMessageExtension,
        ImportMessage.newBuilder().setD(120).build());
      message.setExtension(optionalPublicImportMessageExtension,
        PublicImportMessage.newBuilder().setE(126).build());
      message.setExtension(optionalLazyMessageExtension,
        TestAllTypes.NestedMessage.newBuilder().setBb(127).build());
  
      message.setExtension(optionalNestedEnumExtension, TestAllTypes.NestedEnum.BAZ);
      message.setExtension(optionalForeignEnumExtension, ForeignEnum.FOREIGN_BAZ);
      message.setExtension(optionalImportEnumExtension, ImportEnum.IMPORT_BAZ);
  
      message.setExtension(optionalStringPieceExtension, "124");
      message.setExtension(optionalCordExtension, "125");
  
      // -----------------------------------------------------------------
  
      message.addExtension(repeatedInt32Extension   , 201);
      message.addExtension(repeatedInt64Extension   , 202L);
      message.addExtension(repeatedUint32Extension  , 203);
      message.addExtension(repeatedUint64Extension  , 204L);
      message.addExtension(repeatedSint32Extension  , 205);
      message.addExtension(repeatedSint64Extension  , 206L);
      message.addExtension(repeatedFixed32Extension , 207);
      message.addExtension(repeatedFixed64Extension , 208L);
      message.addExtension(repeatedSfixed32Extension, 209);
      message.addExtension(repeatedSfixed64Extension, 210L);
      message.addExtension(repeatedFloatExtension   , 211F);
      message.addExtension(repeatedDoubleExtension  , 212D);
      message.addExtension(repeatedBoolExtension    , true);
      message.addExtension(repeatedStringExtension  , "215");
      message.addExtension(repeatedBytesExtension   , toBytes("216"));
  
      message.addExtension(repeatedGroupExtension,
        RepeatedGroup_extension.newBuilder().setA(217).build());
      message.addExtension(repeatedNestedMessageExtension,
        TestAllTypes.NestedMessage.newBuilder().setBb(218).build());
      message.addExtension(repeatedForeignMessageExtension,
        ForeignMessage.newBuilder().setC(219).build());
      message.addExtension(repeatedImportMessageExtension,
        ImportMessage.newBuilder().setD(220).build());
      message.addExtension(repeatedLazyMessageExtension,
        TestAllTypes.NestedMessage.newBuilder().setBb(227).build());
  
      message.addExtension(repeatedNestedEnumExtension, TestAllTypes.NestedEnum.BAR);
      message.addExtension(repeatedForeignEnumExtension, ForeignEnum.FOREIGN_BAR);
      message.addExtension(repeatedImportEnumExtension, ImportEnum.IMPORT_BAR);
  
      message.addExtension(repeatedStringPieceExtension, "224");
      message.addExtension(repeatedCordExtension, "225");
  
      // Add a second one of each field.
      message.addExtension(repeatedInt32Extension   , 301);
      message.addExtension(repeatedInt64Extension   , 302L);
      message.addExtension(repeatedUint32Extension  , 303);
      message.addExtension(repeatedUint64Extension  , 304L);
      message.addExtension(repeatedSint32Extension  , 305);
      message.addExtension(repeatedSint64Extension  , 306L);
      message.addExtension(repeatedFixed32Extension , 307);
      message.addExtension(repeatedFixed64Extension , 308L);
      message.addExtension(repeatedSfixed32Extension, 309);
      message.addExtension(repeatedSfixed64Extension, 310L);
      message.addExtension(repeatedFloatExtension   , 311F);
      message.addExtension(repeatedDoubleExtension  , 312D);
      message.addExtension(repeatedBoolExtension    , false);
      message.addExtension(repeatedStringExtension  , "315");
      message.addExtension(repeatedBytesExtension   , toBytes("316"));
  
      message.addExtension(repeatedGroupExtension,
        RepeatedGroup_extension.newBuilder().setA(317).build());
      message.addExtension(repeatedNestedMessageExtension,
        TestAllTypes.NestedMessage.newBuilder().setBb(318).build());
      message.addExtension(repeatedForeignMessageExtension,
        ForeignMessage.newBuilder().setC(319).build());
      message.addExtension(repeatedImportMessageExtension,
        ImportMessage.newBuilder().setD(320).build());
      message.addExtension(repeatedLazyMessageExtension,
        TestAllTypes.NestedMessage.newBuilder().setBb(327).build());
  
      message.addExtension(repeatedNestedEnumExtension, TestAllTypes.NestedEnum.BAZ);
      message.addExtension(repeatedForeignEnumExtension, ForeignEnum.FOREIGN_BAZ);
      message.addExtension(repeatedImportEnumExtension, ImportEnum.IMPORT_BAZ);
  
      message.addExtension(repeatedStringPieceExtension, "324");
      message.addExtension(repeatedCordExtension, "325");
  
      // -----------------------------------------------------------------
  
      message.setExtension(defaultInt32Extension   , 401);
      message.setExtension(defaultInt64Extension   , 402L);
      message.setExtension(defaultUint32Extension  , 403);
      message.setExtension(defaultUint64Extension  , 404L);
      message.setExtension(defaultSint32Extension  , 405);
      message.setExtension(defaultSint64Extension  , 406L);
      message.setExtension(defaultFixed32Extension , 407);
      message.setExtension(defaultFixed64Extension , 408L);
      message.setExtension(defaultSfixed32Extension, 409);
      message.setExtension(defaultSfixed64Extension, 410L);
      message.setExtension(defaultFloatExtension   , 411F);
      message.setExtension(defaultDoubleExtension  , 412D);
      message.setExtension(defaultBoolExtension    , false);
      message.setExtension(defaultStringExtension  , "415");
      message.setExtension(defaultBytesExtension   , toBytes("416"));
  
      message.setExtension(defaultNestedEnumExtension, TestAllTypes.NestedEnum.FOO);
      message.setExtension(defaultForeignEnumExtension, ForeignEnum.FOREIGN_FOO);
      message.setExtension(defaultImportEnumExtension, ImportEnum.IMPORT_FOO);
  
      message.setExtension(defaultStringPieceExtension, "424");
      message.setExtension(defaultCordExtension, "425");
  
      message.setExtension(oneofUint32Extension, 601);
      message.setExtension(oneofNestedMessageExtension,
        TestAllTypes.NestedMessage.newBuilder().setBb(602).build());
      message.setExtension(oneofStringExtension, "603");
      message.setExtension(oneofBytesExtension, toBytes("604"));
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Modify the repeated extensions of {@code message} to contain the values
     * expected by {@code assertRepeatedExtensionsModified()}.
     */
    public static void modifyRepeatedExtensions(
        TestAllExtensions.Builder message) {
      message.setExtension(repeatedInt32Extension   , 1, 501);
      message.setExtension(repeatedInt64Extension   , 1, 502L);
      message.setExtension(repeatedUint32Extension  , 1, 503);
      message.setExtension(repeatedUint64Extension  , 1, 504L);
      message.setExtension(repeatedSint32Extension  , 1, 505);
      message.setExtension(repeatedSint64Extension  , 1, 506L);
      message.setExtension(repeatedFixed32Extension , 1, 507);
      message.setExtension(repeatedFixed64Extension , 1, 508L);
      message.setExtension(repeatedSfixed32Extension, 1, 509);
      message.setExtension(repeatedSfixed64Extension, 1, 510L);
      message.setExtension(repeatedFloatExtension   , 1, 511F);
      message.setExtension(repeatedDoubleExtension  , 1, 512D);
      message.setExtension(repeatedBoolExtension    , 1, true);
      message.setExtension(repeatedStringExtension  , 1, "515");
      message.setExtension(repeatedBytesExtension   , 1, toBytes("516"));
  
      message.setExtension(repeatedGroupExtension, 1,
        RepeatedGroup_extension.newBuilder().setA(517).build());
      message.setExtension(repeatedNestedMessageExtension, 1,
        TestAllTypes.NestedMessage.newBuilder().setBb(518).build());
      message.setExtension(repeatedForeignMessageExtension, 1,
        ForeignMessage.newBuilder().setC(519).build());
      message.setExtension(repeatedImportMessageExtension, 1,
        ImportMessage.newBuilder().setD(520).build());
      message.setExtension(repeatedLazyMessageExtension, 1,
        TestAllTypes.NestedMessage.newBuilder().setBb(527).build());
  
      message.setExtension(repeatedNestedEnumExtension , 1, TestAllTypes.NestedEnum.FOO);
      message.setExtension(repeatedForeignEnumExtension, 1, ForeignEnum.FOREIGN_FOO);
      message.setExtension(repeatedImportEnumExtension , 1, ImportEnum.IMPORT_FOO);
  
      message.setExtension(repeatedStringPieceExtension, 1, "524");
      message.setExtension(repeatedCordExtension, 1, "525");
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all extensions of
     * {@code message} are set to the values assigned by {@code setAllExtensions}.
     */
    public static void assertAllExtensionsSet(
        TestAllExtensionsOrBuilder message) {
      Assert.assertTrue(message.hasExtension(optionalInt32Extension   ));
      Assert.assertTrue(message.hasExtension(optionalInt64Extension   ));
      Assert.assertTrue(message.hasExtension(optionalUint32Extension  ));
      Assert.assertTrue(message.hasExtension(optionalUint64Extension  ));
      Assert.assertTrue(message.hasExtension(optionalSint32Extension  ));
      Assert.assertTrue(message.hasExtension(optionalSint64Extension  ));
      Assert.assertTrue(message.hasExtension(optionalFixed32Extension ));
      Assert.assertTrue(message.hasExtension(optionalFixed64Extension ));
      Assert.assertTrue(message.hasExtension(optionalSfixed32Extension));
      Assert.assertTrue(message.hasExtension(optionalSfixed64Extension));
      Assert.assertTrue(message.hasExtension(optionalFloatExtension   ));
      Assert.assertTrue(message.hasExtension(optionalDoubleExtension  ));
      Assert.assertTrue(message.hasExtension(optionalBoolExtension    ));
      Assert.assertTrue(message.hasExtension(optionalStringExtension  ));
      Assert.assertTrue(message.hasExtension(optionalBytesExtension   ));
  
      Assert.assertTrue(message.hasExtension(optionalGroupExtension         ));
      Assert.assertTrue(message.hasExtension(optionalNestedMessageExtension ));
      Assert.assertTrue(message.hasExtension(optionalForeignMessageExtension));
      Assert.assertTrue(message.hasExtension(optionalImportMessageExtension ));
  
      Assert.assertTrue(message.getExtension(optionalGroupExtension         ).hasA());
      Assert.assertTrue(message.getExtension(optionalNestedMessageExtension ).hasBb());
      Assert.assertTrue(message.getExtension(optionalForeignMessageExtension).hasC());
      Assert.assertTrue(message.getExtension(optionalImportMessageExtension ).hasD());
  
      Assert.assertTrue(message.hasExtension(optionalNestedEnumExtension ));
      Assert.assertTrue(message.hasExtension(optionalForeignEnumExtension));
      Assert.assertTrue(message.hasExtension(optionalImportEnumExtension ));
  
      Assert.assertTrue(message.hasExtension(optionalStringPieceExtension));
      Assert.assertTrue(message.hasExtension(optionalCordExtension));
  
      assertEqualsExactType(101  , message.getExtension(optionalInt32Extension   ));
      assertEqualsExactType(102L , message.getExtension(optionalInt64Extension   ));
      assertEqualsExactType(103  , message.getExtension(optionalUint32Extension  ));
      assertEqualsExactType(104L , message.getExtension(optionalUint64Extension  ));
      assertEqualsExactType(105  , message.getExtension(optionalSint32Extension  ));
      assertEqualsExactType(106L , message.getExtension(optionalSint64Extension  ));
      assertEqualsExactType(107  , message.getExtension(optionalFixed32Extension ));
      assertEqualsExactType(108L , message.getExtension(optionalFixed64Extension ));
      assertEqualsExactType(109  , message.getExtension(optionalSfixed32Extension));
      assertEqualsExactType(110L , message.getExtension(optionalSfixed64Extension));
      assertEqualsExactType(111F , message.getExtension(optionalFloatExtension   ));
      assertEqualsExactType(112D , message.getExtension(optionalDoubleExtension  ));
      assertEqualsExactType(true , message.getExtension(optionalBoolExtension    ));
      assertEqualsExactType("115", message.getExtension(optionalStringExtension  ));
      assertEqualsExactType(toBytes("116"), message.getExtension(optionalBytesExtension));
  
      assertEqualsExactType(117, message.getExtension(optionalGroupExtension              ).getA());
      assertEqualsExactType(118, message.getExtension(optionalNestedMessageExtension      ).getBb());
      assertEqualsExactType(119, message.getExtension(optionalForeignMessageExtension     ).getC());
      assertEqualsExactType(120, message.getExtension(optionalImportMessageExtension      ).getD());
      assertEqualsExactType(126, message.getExtension(optionalPublicImportMessageExtension).getE());
      assertEqualsExactType(127, message.getExtension(optionalLazyMessageExtension        ).getBb());
  
      assertEqualsExactType(TestAllTypes.NestedEnum.BAZ,
        message.getExtension(optionalNestedEnumExtension));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAZ,
        message.getExtension(optionalForeignEnumExtension));
      assertEqualsExactType(ImportEnum.IMPORT_BAZ,
        message.getExtension(optionalImportEnumExtension));
  
      assertEqualsExactType("124", message.getExtension(optionalStringPieceExtension));
      assertEqualsExactType("125", message.getExtension(optionalCordExtension));
  
      // -----------------------------------------------------------------
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedInt32Extension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedInt64Extension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedUint32Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedUint64Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSint32Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSint64Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFixed32Extension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFixed64Extension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSfixed32Extension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSfixed64Extension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFloatExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedDoubleExtension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedBoolExtension    ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedStringExtension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedBytesExtension   ));
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedGroupExtension         ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedNestedMessageExtension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedForeignMessageExtension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedImportMessageExtension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedLazyMessageExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedNestedEnumExtension    ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedForeignEnumExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedImportEnumExtension    ));
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedStringPieceExtension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedCordExtension));
  
      assertEqualsExactType(201  , message.getExtension(repeatedInt32Extension   , 0));
      assertEqualsExactType(202L , message.getExtension(repeatedInt64Extension   , 0));
      assertEqualsExactType(203  , message.getExtension(repeatedUint32Extension  , 0));
      assertEqualsExactType(204L , message.getExtension(repeatedUint64Extension  , 0));
      assertEqualsExactType(205  , message.getExtension(repeatedSint32Extension  , 0));
      assertEqualsExactType(206L , message.getExtension(repeatedSint64Extension  , 0));
      assertEqualsExactType(207  , message.getExtension(repeatedFixed32Extension , 0));
      assertEqualsExactType(208L , message.getExtension(repeatedFixed64Extension , 0));
      assertEqualsExactType(209  , message.getExtension(repeatedSfixed32Extension, 0));
      assertEqualsExactType(210L , message.getExtension(repeatedSfixed64Extension, 0));
      assertEqualsExactType(211F , message.getExtension(repeatedFloatExtension   , 0));
      assertEqualsExactType(212D , message.getExtension(repeatedDoubleExtension  , 0));
      assertEqualsExactType(true , message.getExtension(repeatedBoolExtension    , 0));
      assertEqualsExactType("215", message.getExtension(repeatedStringExtension  , 0));
      assertEqualsExactType(toBytes("216"), message.getExtension(repeatedBytesExtension, 0));
  
      assertEqualsExactType(217, message.getExtension(repeatedGroupExtension         , 0).getA());
      assertEqualsExactType(218, message.getExtension(repeatedNestedMessageExtension , 0).getBb());
      assertEqualsExactType(219, message.getExtension(repeatedForeignMessageExtension, 0).getC());
      assertEqualsExactType(220, message.getExtension(repeatedImportMessageExtension , 0).getD());
      assertEqualsExactType(227, message.getExtension(repeatedLazyMessageExtension   , 0).getBb());
  
      assertEqualsExactType(TestAllTypes.NestedEnum.BAR,
        message.getExtension(repeatedNestedEnumExtension, 0));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAR,
        message.getExtension(repeatedForeignEnumExtension, 0));
      assertEqualsExactType(ImportEnum.IMPORT_BAR,
        message.getExtension(repeatedImportEnumExtension, 0));
  
      assertEqualsExactType("224", message.getExtension(repeatedStringPieceExtension, 0));
      assertEqualsExactType("225", message.getExtension(repeatedCordExtension, 0));
  
      assertEqualsExactType(301  , message.getExtension(repeatedInt32Extension   , 1));
      assertEqualsExactType(302L , message.getExtension(repeatedInt64Extension   , 1));
      assertEqualsExactType(303  , message.getExtension(repeatedUint32Extension  , 1));
      assertEqualsExactType(304L , message.getExtension(repeatedUint64Extension  , 1));
      assertEqualsExactType(305  , message.getExtension(repeatedSint32Extension  , 1));
      assertEqualsExactType(306L , message.getExtension(repeatedSint64Extension  , 1));
      assertEqualsExactType(307  , message.getExtension(repeatedFixed32Extension , 1));
      assertEqualsExactType(308L , message.getExtension(repeatedFixed64Extension , 1));
      assertEqualsExactType(309  , message.getExtension(repeatedSfixed32Extension, 1));
      assertEqualsExactType(310L , message.getExtension(repeatedSfixed64Extension, 1));
      assertEqualsExactType(311F , message.getExtension(repeatedFloatExtension   , 1));
      assertEqualsExactType(312D , message.getExtension(repeatedDoubleExtension  , 1));
      assertEqualsExactType(false, message.getExtension(repeatedBoolExtension    , 1));
      assertEqualsExactType("315", message.getExtension(repeatedStringExtension  , 1));
      assertEqualsExactType(toBytes("316"), message.getExtension(repeatedBytesExtension, 1));
  
      assertEqualsExactType(317, message.getExtension(repeatedGroupExtension         , 1).getA());
      assertEqualsExactType(318, message.getExtension(repeatedNestedMessageExtension , 1).getBb());
      assertEqualsExactType(319, message.getExtension(repeatedForeignMessageExtension, 1).getC());
      assertEqualsExactType(320, message.getExtension(repeatedImportMessageExtension , 1).getD());
      assertEqualsExactType(327, message.getExtension(repeatedLazyMessageExtension   , 1).getBb());
  
      assertEqualsExactType(TestAllTypes.NestedEnum.BAZ,
        message.getExtension(repeatedNestedEnumExtension, 1));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAZ,
        message.getExtension(repeatedForeignEnumExtension, 1));
      assertEqualsExactType(ImportEnum.IMPORT_BAZ,
        message.getExtension(repeatedImportEnumExtension, 1));
  
      assertEqualsExactType("324", message.getExtension(repeatedStringPieceExtension, 1));
      assertEqualsExactType("325", message.getExtension(repeatedCordExtension, 1));
  
      // -----------------------------------------------------------------
  
      Assert.assertTrue(message.hasExtension(defaultInt32Extension   ));
      Assert.assertTrue(message.hasExtension(defaultInt64Extension   ));
      Assert.assertTrue(message.hasExtension(defaultUint32Extension  ));
      Assert.assertTrue(message.hasExtension(defaultUint64Extension  ));
      Assert.assertTrue(message.hasExtension(defaultSint32Extension  ));
      Assert.assertTrue(message.hasExtension(defaultSint64Extension  ));
      Assert.assertTrue(message.hasExtension(defaultFixed32Extension ));
      Assert.assertTrue(message.hasExtension(defaultFixed64Extension ));
      Assert.assertTrue(message.hasExtension(defaultSfixed32Extension));
      Assert.assertTrue(message.hasExtension(defaultSfixed64Extension));
      Assert.assertTrue(message.hasExtension(defaultFloatExtension   ));
      Assert.assertTrue(message.hasExtension(defaultDoubleExtension  ));
      Assert.assertTrue(message.hasExtension(defaultBoolExtension    ));
      Assert.assertTrue(message.hasExtension(defaultStringExtension  ));
      Assert.assertTrue(message.hasExtension(defaultBytesExtension   ));
  
      Assert.assertTrue(message.hasExtension(defaultNestedEnumExtension ));
      Assert.assertTrue(message.hasExtension(defaultForeignEnumExtension));
      Assert.assertTrue(message.hasExtension(defaultImportEnumExtension ));
  
      Assert.assertTrue(message.hasExtension(defaultStringPieceExtension));
      Assert.assertTrue(message.hasExtension(defaultCordExtension));
  
      assertEqualsExactType(401  , message.getExtension(defaultInt32Extension   ));
      assertEqualsExactType(402L , message.getExtension(defaultInt64Extension   ));
      assertEqualsExactType(403  , message.getExtension(defaultUint32Extension  ));
      assertEqualsExactType(404L , message.getExtension(defaultUint64Extension  ));
      assertEqualsExactType(405  , message.getExtension(defaultSint32Extension  ));
      assertEqualsExactType(406L , message.getExtension(defaultSint64Extension  ));
      assertEqualsExactType(407  , message.getExtension(defaultFixed32Extension ));
      assertEqualsExactType(408L , message.getExtension(defaultFixed64Extension ));
      assertEqualsExactType(409  , message.getExtension(defaultSfixed32Extension));
      assertEqualsExactType(410L , message.getExtension(defaultSfixed64Extension));
      assertEqualsExactType(411F , message.getExtension(defaultFloatExtension   ));
      assertEqualsExactType(412D , message.getExtension(defaultDoubleExtension  ));
      assertEqualsExactType(false, message.getExtension(defaultBoolExtension    ));
      assertEqualsExactType("415", message.getExtension(defaultStringExtension  ));
      assertEqualsExactType(toBytes("416"), message.getExtension(defaultBytesExtension));
  
      assertEqualsExactType(TestAllTypes.NestedEnum.FOO,
        message.getExtension(defaultNestedEnumExtension ));
      assertEqualsExactType(ForeignEnum.FOREIGN_FOO,
        message.getExtension(defaultForeignEnumExtension));
      assertEqualsExactType(ImportEnum.IMPORT_FOO,
        message.getExtension(defaultImportEnumExtension));
  
      assertEqualsExactType("424", message.getExtension(defaultStringPieceExtension));
      assertEqualsExactType("425", message.getExtension(defaultCordExtension));
  
      Assert.assertTrue(message.hasExtension(oneofBytesExtension));
  
      assertEqualsExactType(toBytes("604"), message.getExtension(oneofBytesExtension));
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all extensions of
     * {@code message} are cleared, and that getting the extensions returns their
     * default values.
     */
    public static void assertExtensionsClear(TestAllExtensionsOrBuilder message) {
      // hasBlah() should initially be false for all optional fields.
      Assert.assertFalse(message.hasExtension(optionalInt32Extension   ));
      Assert.assertFalse(message.hasExtension(optionalInt64Extension   ));
      Assert.assertFalse(message.hasExtension(optionalUint32Extension  ));
      Assert.assertFalse(message.hasExtension(optionalUint64Extension  ));
      Assert.assertFalse(message.hasExtension(optionalSint32Extension  ));
      Assert.assertFalse(message.hasExtension(optionalSint64Extension  ));
      Assert.assertFalse(message.hasExtension(optionalFixed32Extension ));
      Assert.assertFalse(message.hasExtension(optionalFixed64Extension ));
      Assert.assertFalse(message.hasExtension(optionalSfixed32Extension));
      Assert.assertFalse(message.hasExtension(optionalSfixed64Extension));
      Assert.assertFalse(message.hasExtension(optionalFloatExtension   ));
      Assert.assertFalse(message.hasExtension(optionalDoubleExtension  ));
      Assert.assertFalse(message.hasExtension(optionalBoolExtension    ));
      Assert.assertFalse(message.hasExtension(optionalStringExtension  ));
      Assert.assertFalse(message.hasExtension(optionalBytesExtension   ));
  
      Assert.assertFalse(message.hasExtension(optionalGroupExtension         ));
      Assert.assertFalse(message.hasExtension(optionalNestedMessageExtension ));
      Assert.assertFalse(message.hasExtension(optionalForeignMessageExtension));
      Assert.assertFalse(message.hasExtension(optionalImportMessageExtension ));
  
      Assert.assertFalse(message.hasExtension(optionalNestedEnumExtension ));
      Assert.assertFalse(message.hasExtension(optionalForeignEnumExtension));
      Assert.assertFalse(message.hasExtension(optionalImportEnumExtension ));
  
      Assert.assertFalse(message.hasExtension(optionalStringPieceExtension));
      Assert.assertFalse(message.hasExtension(optionalCordExtension));
  
      // Optional fields without defaults are set to zero or something like it.
      assertEqualsExactType(0    , message.getExtension(optionalInt32Extension   ));
      assertEqualsExactType(0L   , message.getExtension(optionalInt64Extension   ));
      assertEqualsExactType(0    , message.getExtension(optionalUint32Extension  ));
      assertEqualsExactType(0L   , message.getExtension(optionalUint64Extension  ));
      assertEqualsExactType(0    , message.getExtension(optionalSint32Extension  ));
      assertEqualsExactType(0L   , message.getExtension(optionalSint64Extension  ));
      assertEqualsExactType(0    , message.getExtension(optionalFixed32Extension ));
      assertEqualsExactType(0L   , message.getExtension(optionalFixed64Extension ));
      assertEqualsExactType(0    , message.getExtension(optionalSfixed32Extension));
      assertEqualsExactType(0L   , message.getExtension(optionalSfixed64Extension));
      assertEqualsExactType(0F   , message.getExtension(optionalFloatExtension   ));
      assertEqualsExactType(0D   , message.getExtension(optionalDoubleExtension  ));
      assertEqualsExactType(false, message.getExtension(optionalBoolExtension    ));
      assertEqualsExactType(""   , message.getExtension(optionalStringExtension  ));
      assertEqualsExactType(ByteString.EMPTY, message.getExtension(optionalBytesExtension));
  
      // Embedded messages should also be clear.
      Assert.assertFalse(message.getExtension(optionalGroupExtension         ).hasA());
      Assert.assertFalse(message.getExtension(optionalNestedMessageExtension ).hasBb());
      Assert.assertFalse(message.getExtension(optionalForeignMessageExtension).hasC());
      Assert.assertFalse(message.getExtension(optionalImportMessageExtension ).hasD());
  
      assertEqualsExactType(0, message.getExtension(optionalGroupExtension         ).getA());
      assertEqualsExactType(0, message.getExtension(optionalNestedMessageExtension ).getBb());
      assertEqualsExactType(0, message.getExtension(optionalForeignMessageExtension).getC());
      assertEqualsExactType(0, message.getExtension(optionalImportMessageExtension ).getD());
  
      // Enums without defaults are set to the first value in the enum.
      assertEqualsExactType(TestAllTypes.NestedEnum.FOO,
        message.getExtension(optionalNestedEnumExtension ));
      assertEqualsExactType(ForeignEnum.FOREIGN_FOO,
        message.getExtension(optionalForeignEnumExtension));
      assertEqualsExactType(ImportEnum.IMPORT_FOO,
        message.getExtension(optionalImportEnumExtension));
  
      assertEqualsExactType("", message.getExtension(optionalStringPieceExtension));
      assertEqualsExactType("", message.getExtension(optionalCordExtension));
  
      // Repeated fields are empty.
      Assert.assertEquals(0, message.getExtensionCount(repeatedInt32Extension   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedInt64Extension   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedUint32Extension  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedUint64Extension  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedSint32Extension  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedSint64Extension  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedFixed32Extension ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedFixed64Extension ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedSfixed32Extension));
      Assert.assertEquals(0, message.getExtensionCount(repeatedSfixed64Extension));
      Assert.assertEquals(0, message.getExtensionCount(repeatedFloatExtension   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedDoubleExtension  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedBoolExtension    ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedStringExtension  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedBytesExtension   ));
  
      Assert.assertEquals(0, message.getExtensionCount(repeatedGroupExtension         ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedNestedMessageExtension ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedForeignMessageExtension));
      Assert.assertEquals(0, message.getExtensionCount(repeatedImportMessageExtension ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedLazyMessageExtension   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedNestedEnumExtension    ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedForeignEnumExtension   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedImportEnumExtension    ));
  
      Assert.assertEquals(0, message.getExtensionCount(repeatedStringPieceExtension));
      Assert.assertEquals(0, message.getExtensionCount(repeatedCordExtension));
  
      // Repeated fields are empty via getExtension().size().
      Assert.assertEquals(0, message.getExtension(repeatedInt32Extension   ).size());
      Assert.assertEquals(0, message.getExtension(repeatedInt64Extension   ).size());
      Assert.assertEquals(0, message.getExtension(repeatedUint32Extension  ).size());
      Assert.assertEquals(0, message.getExtension(repeatedUint64Extension  ).size());
      Assert.assertEquals(0, message.getExtension(repeatedSint32Extension  ).size());
      Assert.assertEquals(0, message.getExtension(repeatedSint64Extension  ).size());
      Assert.assertEquals(0, message.getExtension(repeatedFixed32Extension ).size());
      Assert.assertEquals(0, message.getExtension(repeatedFixed64Extension ).size());
      Assert.assertEquals(0, message.getExtension(repeatedSfixed32Extension).size());
      Assert.assertEquals(0, message.getExtension(repeatedSfixed64Extension).size());
      Assert.assertEquals(0, message.getExtension(repeatedFloatExtension   ).size());
      Assert.assertEquals(0, message.getExtension(repeatedDoubleExtension  ).size());
      Assert.assertEquals(0, message.getExtension(repeatedBoolExtension    ).size());
      Assert.assertEquals(0, message.getExtension(repeatedStringExtension  ).size());
      Assert.assertEquals(0, message.getExtension(repeatedBytesExtension   ).size());
  
      Assert.assertEquals(0, message.getExtension(repeatedGroupExtension         ).size());
      Assert.assertEquals(0, message.getExtension(repeatedNestedMessageExtension ).size());
      Assert.assertEquals(0, message.getExtension(repeatedForeignMessageExtension).size());
      Assert.assertEquals(0, message.getExtension(repeatedImportMessageExtension ).size());
      Assert.assertEquals(0, message.getExtension(repeatedLazyMessageExtension   ).size());
      Assert.assertEquals(0, message.getExtension(repeatedNestedEnumExtension    ).size());
      Assert.assertEquals(0, message.getExtension(repeatedForeignEnumExtension   ).size());
      Assert.assertEquals(0, message.getExtension(repeatedImportEnumExtension    ).size());
  
      Assert.assertEquals(0, message.getExtension(repeatedStringPieceExtension).size());
      Assert.assertEquals(0, message.getExtension(repeatedCordExtension).size());
  
      // hasBlah() should also be false for all default fields.
      Assert.assertFalse(message.hasExtension(defaultInt32Extension   ));
      Assert.assertFalse(message.hasExtension(defaultInt64Extension   ));
      Assert.assertFalse(message.hasExtension(defaultUint32Extension  ));
      Assert.assertFalse(message.hasExtension(defaultUint64Extension  ));
      Assert.assertFalse(message.hasExtension(defaultSint32Extension  ));
      Assert.assertFalse(message.hasExtension(defaultSint64Extension  ));
      Assert.assertFalse(message.hasExtension(defaultFixed32Extension ));
      Assert.assertFalse(message.hasExtension(defaultFixed64Extension ));
      Assert.assertFalse(message.hasExtension(defaultSfixed32Extension));
      Assert.assertFalse(message.hasExtension(defaultSfixed64Extension));
      Assert.assertFalse(message.hasExtension(defaultFloatExtension   ));
      Assert.assertFalse(message.hasExtension(defaultDoubleExtension  ));
      Assert.assertFalse(message.hasExtension(defaultBoolExtension    ));
      Assert.assertFalse(message.hasExtension(defaultStringExtension  ));
      Assert.assertFalse(message.hasExtension(defaultBytesExtension   ));
  
      Assert.assertFalse(message.hasExtension(defaultNestedEnumExtension ));
      Assert.assertFalse(message.hasExtension(defaultForeignEnumExtension));
      Assert.assertFalse(message.hasExtension(defaultImportEnumExtension ));
  
      Assert.assertFalse(message.hasExtension(defaultStringPieceExtension));
      Assert.assertFalse(message.hasExtension(defaultCordExtension));
  
      // Fields with defaults have their default values (duh).
      assertEqualsExactType( 41    , message.getExtension(defaultInt32Extension   ));
      assertEqualsExactType( 42L   , message.getExtension(defaultInt64Extension   ));
      assertEqualsExactType( 43    , message.getExtension(defaultUint32Extension  ));
      assertEqualsExactType( 44L   , message.getExtension(defaultUint64Extension  ));
      assertEqualsExactType(-45    , message.getExtension(defaultSint32Extension  ));
      assertEqualsExactType( 46L   , message.getExtension(defaultSint64Extension  ));
      assertEqualsExactType( 47    , message.getExtension(defaultFixed32Extension ));
      assertEqualsExactType( 48L   , message.getExtension(defaultFixed64Extension ));
      assertEqualsExactType( 49    , message.getExtension(defaultSfixed32Extension));
      assertEqualsExactType(-50L   , message.getExtension(defaultSfixed64Extension));
      assertEqualsExactType( 51.5F , message.getExtension(defaultFloatExtension   ));
      assertEqualsExactType( 52e3D , message.getExtension(defaultDoubleExtension  ));
      assertEqualsExactType(true   , message.getExtension(defaultBoolExtension    ));
      assertEqualsExactType("hello", message.getExtension(defaultStringExtension  ));
      assertEqualsExactType(toBytes("world"), message.getExtension(defaultBytesExtension));
  
      assertEqualsExactType(TestAllTypes.NestedEnum.BAR,
        message.getExtension(defaultNestedEnumExtension ));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAR,
        message.getExtension(defaultForeignEnumExtension));
      assertEqualsExactType(ImportEnum.IMPORT_BAR,
        message.getExtension(defaultImportEnumExtension));
  
      assertEqualsExactType("abc", message.getExtension(defaultStringPieceExtension));
      assertEqualsExactType("123", message.getExtension(defaultCordExtension));
  
      Assert.assertFalse(message.hasExtension(oneofUint32Extension));
      Assert.assertFalse(message.hasExtension(oneofNestedMessageExtension));
      Assert.assertFalse(message.hasExtension(oneofStringExtension));
      Assert.assertFalse(message.hasExtension(oneofBytesExtension));
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all extensions of
     * {@code message} are set to the values assigned by {@code setAllExtensions}
     * followed by {@code modifyRepeatedExtensions}.
     */
    public static void assertRepeatedExtensionsModified(
        TestAllExtensionsOrBuilder message) {
      // ModifyRepeatedFields only sets the second repeated element of each
      // field.  In addition to verifying this, we also verify that the first
      // element and size were *not* modified.
      Assert.assertEquals(2, message.getExtensionCount(repeatedInt32Extension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedInt64Extension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedUint32Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedUint64Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSint32Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSint64Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFixed32Extension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFixed64Extension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSfixed32Extension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSfixed64Extension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFloatExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedDoubleExtension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedBoolExtension    ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedStringExtension  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedBytesExtension   ));
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedGroupExtension         ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedNestedMessageExtension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedForeignMessageExtension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedImportMessageExtension ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedLazyMessageExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedNestedEnumExtension    ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedForeignEnumExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedImportEnumExtension    ));
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedStringPieceExtension));
      Assert.assertEquals(2, message.getExtensionCount(repeatedCordExtension));
  
      assertEqualsExactType(201  , message.getExtension(repeatedInt32Extension   , 0));
      assertEqualsExactType(202L , message.getExtension(repeatedInt64Extension   , 0));
      assertEqualsExactType(203  , message.getExtension(repeatedUint32Extension  , 0));
      assertEqualsExactType(204L , message.getExtension(repeatedUint64Extension  , 0));
      assertEqualsExactType(205  , message.getExtension(repeatedSint32Extension  , 0));
      assertEqualsExactType(206L , message.getExtension(repeatedSint64Extension  , 0));
      assertEqualsExactType(207  , message.getExtension(repeatedFixed32Extension , 0));
      assertEqualsExactType(208L , message.getExtension(repeatedFixed64Extension , 0));
      assertEqualsExactType(209  , message.getExtension(repeatedSfixed32Extension, 0));
      assertEqualsExactType(210L , message.getExtension(repeatedSfixed64Extension, 0));
      assertEqualsExactType(211F , message.getExtension(repeatedFloatExtension   , 0));
      assertEqualsExactType(212D , message.getExtension(repeatedDoubleExtension  , 0));
      assertEqualsExactType(true , message.getExtension(repeatedBoolExtension    , 0));
      assertEqualsExactType("215", message.getExtension(repeatedStringExtension  , 0));
      assertEqualsExactType(toBytes("216"), message.getExtension(repeatedBytesExtension, 0));
  
      assertEqualsExactType(217, message.getExtension(repeatedGroupExtension         , 0).getA());
      assertEqualsExactType(218, message.getExtension(repeatedNestedMessageExtension , 0).getBb());
      assertEqualsExactType(219, message.getExtension(repeatedForeignMessageExtension, 0).getC());
      assertEqualsExactType(220, message.getExtension(repeatedImportMessageExtension , 0).getD());
      assertEqualsExactType(227, message.getExtension(repeatedLazyMessageExtension   , 0).getBb());
  
      assertEqualsExactType(TestAllTypes.NestedEnum.BAR,
        message.getExtension(repeatedNestedEnumExtension, 0));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAR,
        message.getExtension(repeatedForeignEnumExtension, 0));
      assertEqualsExactType(ImportEnum.IMPORT_BAR,
        message.getExtension(repeatedImportEnumExtension, 0));
  
      assertEqualsExactType("224", message.getExtension(repeatedStringPieceExtension, 0));
      assertEqualsExactType("225", message.getExtension(repeatedCordExtension, 0));
  
      // Actually verify the second (modified) elements now.
      assertEqualsExactType(501  , message.getExtension(repeatedInt32Extension   , 1));
      assertEqualsExactType(502L , message.getExtension(repeatedInt64Extension   , 1));
      assertEqualsExactType(503  , message.getExtension(repeatedUint32Extension  , 1));
      assertEqualsExactType(504L , message.getExtension(repeatedUint64Extension  , 1));
      assertEqualsExactType(505  , message.getExtension(repeatedSint32Extension  , 1));
      assertEqualsExactType(506L , message.getExtension(repeatedSint64Extension  , 1));
      assertEqualsExactType(507  , message.getExtension(repeatedFixed32Extension , 1));
      assertEqualsExactType(508L , message.getExtension(repeatedFixed64Extension , 1));
      assertEqualsExactType(509  , message.getExtension(repeatedSfixed32Extension, 1));
      assertEqualsExactType(510L , message.getExtension(repeatedSfixed64Extension, 1));
      assertEqualsExactType(511F , message.getExtension(repeatedFloatExtension   , 1));
      assertEqualsExactType(512D , message.getExtension(repeatedDoubleExtension  , 1));
      assertEqualsExactType(true , message.getExtension(repeatedBoolExtension    , 1));
      assertEqualsExactType("515", message.getExtension(repeatedStringExtension  , 1));
      assertEqualsExactType(toBytes("516"), message.getExtension(repeatedBytesExtension, 1));
  
      assertEqualsExactType(517, message.getExtension(repeatedGroupExtension         , 1).getA());
      assertEqualsExactType(518, message.getExtension(repeatedNestedMessageExtension , 1).getBb());
      assertEqualsExactType(519, message.getExtension(repeatedForeignMessageExtension, 1).getC());
      assertEqualsExactType(520, message.getExtension(repeatedImportMessageExtension , 1).getD());
      assertEqualsExactType(527, message.getExtension(repeatedLazyMessageExtension   , 1).getBb());
  
      assertEqualsExactType(TestAllTypes.NestedEnum.FOO,
        message.getExtension(repeatedNestedEnumExtension, 1));
      assertEqualsExactType(ForeignEnum.FOREIGN_FOO,
        message.getExtension(repeatedForeignEnumExtension, 1));
      assertEqualsExactType(ImportEnum.IMPORT_FOO,
        message.getExtension(repeatedImportEnumExtension, 1));
  
      assertEqualsExactType("524", message.getExtension(repeatedStringPieceExtension, 1));
      assertEqualsExactType("525", message.getExtension(repeatedCordExtension, 1));
    }
  
    public static void setPackedExtensions(TestPackedExtensions.Builder message) {
      message.addExtension(packedInt32Extension   , 601);
      message.addExtension(packedInt64Extension   , 602L);
      message.addExtension(packedUint32Extension  , 603);
      message.addExtension(packedUint64Extension  , 604L);
      message.addExtension(packedSint32Extension  , 605);
      message.addExtension(packedSint64Extension  , 606L);
      message.addExtension(packedFixed32Extension , 607);
      message.addExtension(packedFixed64Extension , 608L);
      message.addExtension(packedSfixed32Extension, 609);
      message.addExtension(packedSfixed64Extension, 610L);
      message.addExtension(packedFloatExtension   , 611F);
      message.addExtension(packedDoubleExtension  , 612D);
      message.addExtension(packedBoolExtension    , true);
      message.addExtension(packedEnumExtension, ForeignEnum.FOREIGN_BAR);
      // Add a second one of each field.
      message.addExtension(packedInt32Extension   , 701);
      message.addExtension(packedInt64Extension   , 702L);
      message.addExtension(packedUint32Extension  , 703);
      message.addExtension(packedUint64Extension  , 704L);
      message.addExtension(packedSint32Extension  , 705);
      message.addExtension(packedSint64Extension  , 706L);
      message.addExtension(packedFixed32Extension , 707);
      message.addExtension(packedFixed64Extension , 708L);
      message.addExtension(packedSfixed32Extension, 709);
      message.addExtension(packedSfixed64Extension, 710L);
      message.addExtension(packedFloatExtension   , 711F);
      message.addExtension(packedDoubleExtension  , 712D);
      message.addExtension(packedBoolExtension    , false);
      message.addExtension(packedEnumExtension, ForeignEnum.FOREIGN_BAZ);
    }
  
    public static void assertPackedExtensionsSet(TestPackedExtensions message) {
      Assert.assertEquals(2, message.getExtensionCount(packedInt32Extension   ));
      Assert.assertEquals(2, message.getExtensionCount(packedInt64Extension   ));
      Assert.assertEquals(2, message.getExtensionCount(packedUint32Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(packedUint64Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(packedSint32Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(packedSint64Extension  ));
      Assert.assertEquals(2, message.getExtensionCount(packedFixed32Extension ));
      Assert.assertEquals(2, message.getExtensionCount(packedFixed64Extension ));
      Assert.assertEquals(2, message.getExtensionCount(packedSfixed32Extension));
      Assert.assertEquals(2, message.getExtensionCount(packedSfixed64Extension));
      Assert.assertEquals(2, message.getExtensionCount(packedFloatExtension   ));
      Assert.assertEquals(2, message.getExtensionCount(packedDoubleExtension  ));
      Assert.assertEquals(2, message.getExtensionCount(packedBoolExtension    ));
      Assert.assertEquals(2, message.getExtensionCount(packedEnumExtension));
      assertEqualsExactType(601  , message.getExtension(packedInt32Extension   , 0));
      assertEqualsExactType(602L , message.getExtension(packedInt64Extension   , 0));
      assertEqualsExactType(603  , message.getExtension(packedUint32Extension  , 0));
      assertEqualsExactType(604L , message.getExtension(packedUint64Extension  , 0));
      assertEqualsExactType(605  , message.getExtension(packedSint32Extension  , 0));
      assertEqualsExactType(606L , message.getExtension(packedSint64Extension  , 0));
      assertEqualsExactType(607  , message.getExtension(packedFixed32Extension , 0));
      assertEqualsExactType(608L , message.getExtension(packedFixed64Extension , 0));
      assertEqualsExactType(609  , message.getExtension(packedSfixed32Extension, 0));
      assertEqualsExactType(610L , message.getExtension(packedSfixed64Extension, 0));
      assertEqualsExactType(611F , message.getExtension(packedFloatExtension   , 0));
      assertEqualsExactType(612D , message.getExtension(packedDoubleExtension  , 0));
      assertEqualsExactType(true , message.getExtension(packedBoolExtension    , 0));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAR,
                            message.getExtension(packedEnumExtension, 0));
      assertEqualsExactType(701  , message.getExtension(packedInt32Extension   , 1));
      assertEqualsExactType(702L , message.getExtension(packedInt64Extension   , 1));
      assertEqualsExactType(703  , message.getExtension(packedUint32Extension  , 1));
      assertEqualsExactType(704L , message.getExtension(packedUint64Extension  , 1));
      assertEqualsExactType(705  , message.getExtension(packedSint32Extension  , 1));
      assertEqualsExactType(706L , message.getExtension(packedSint64Extension  , 1));
      assertEqualsExactType(707  , message.getExtension(packedFixed32Extension , 1));
      assertEqualsExactType(708L , message.getExtension(packedFixed64Extension , 1));
      assertEqualsExactType(709  , message.getExtension(packedSfixed32Extension, 1));
      assertEqualsExactType(710L , message.getExtension(packedSfixed64Extension, 1));
      assertEqualsExactType(711F , message.getExtension(packedFloatExtension   , 1));
      assertEqualsExactType(712D , message.getExtension(packedDoubleExtension  , 1));
      assertEqualsExactType(false, message.getExtension(packedBoolExtension    , 1));
      assertEqualsExactType(ForeignEnum.FOREIGN_BAZ,
                            message.getExtension(packedEnumExtension, 1));
    }
  
    // ===================================================================
    // Lite extensions
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all extensions of
     * {@code message} are set to the values assigned by {@code setAllExtensions}.
     */
    public static void assertAllExtensionsSet(
        TestAllExtensionsLiteOrBuilder message) {
      Assert.assertTrue(message.hasExtension(optionalInt32ExtensionLite   ));
      Assert.assertTrue(message.hasExtension(optionalInt64ExtensionLite   ));
      Assert.assertTrue(message.hasExtension(optionalUint32ExtensionLite  ));
      Assert.assertTrue(message.hasExtension(optionalUint64ExtensionLite  ));
      Assert.assertTrue(message.hasExtension(optionalSint32ExtensionLite  ));
      Assert.assertTrue(message.hasExtension(optionalSint64ExtensionLite  ));
      Assert.assertTrue(message.hasExtension(optionalFixed32ExtensionLite ));
      Assert.assertTrue(message.hasExtension(optionalFixed64ExtensionLite ));
      Assert.assertTrue(message.hasExtension(optionalSfixed32ExtensionLite));
      Assert.assertTrue(message.hasExtension(optionalSfixed64ExtensionLite));
      Assert.assertTrue(message.hasExtension(optionalFloatExtensionLite   ));
      Assert.assertTrue(message.hasExtension(optionalDoubleExtensionLite  ));
      Assert.assertTrue(message.hasExtension(optionalBoolExtensionLite    ));
      Assert.assertTrue(message.hasExtension(optionalStringExtensionLite  ));
      Assert.assertTrue(message.hasExtension(optionalBytesExtensionLite   ));
  
      Assert.assertTrue(message.hasExtension(optionalGroupExtensionLite         ));
      Assert.assertTrue(message.hasExtension(optionalNestedMessageExtensionLite ));
      Assert.assertTrue(message.hasExtension(optionalForeignMessageExtensionLite));
      Assert.assertTrue(message.hasExtension(optionalImportMessageExtensionLite ));
  
      Assert.assertTrue(message.getExtension(optionalGroupExtensionLite         ).hasA());
      Assert.assertTrue(message.getExtension(optionalNestedMessageExtensionLite ).hasBb());
      Assert.assertTrue(message.getExtension(optionalForeignMessageExtensionLite).hasC());
      Assert.assertTrue(message.getExtension(optionalImportMessageExtensionLite ).hasD());
  
      Assert.assertTrue(message.hasExtension(optionalNestedEnumExtensionLite ));
      Assert.assertTrue(message.hasExtension(optionalForeignEnumExtensionLite));
      Assert.assertTrue(message.hasExtension(optionalImportEnumExtensionLite ));
  
      Assert.assertTrue(message.hasExtension(optionalStringPieceExtensionLite));
      Assert.assertTrue(message.hasExtension(optionalCordExtensionLite));
  
      assertEqualsExactType(101  , message.getExtension(optionalInt32ExtensionLite   ));
      assertEqualsExactType(102L , message.getExtension(optionalInt64ExtensionLite   ));
      assertEqualsExactType(103  , message.getExtension(optionalUint32ExtensionLite  ));
      assertEqualsExactType(104L , message.getExtension(optionalUint64ExtensionLite  ));
      assertEqualsExactType(105  , message.getExtension(optionalSint32ExtensionLite  ));
      assertEqualsExactType(106L , message.getExtension(optionalSint64ExtensionLite  ));
      assertEqualsExactType(107  , message.getExtension(optionalFixed32ExtensionLite ));
      assertEqualsExactType(108L , message.getExtension(optionalFixed64ExtensionLite ));
      assertEqualsExactType(109  , message.getExtension(optionalSfixed32ExtensionLite));
      assertEqualsExactType(110L , message.getExtension(optionalSfixed64ExtensionLite));
      assertEqualsExactType(111F , message.getExtension(optionalFloatExtensionLite   ));
      assertEqualsExactType(112D , message.getExtension(optionalDoubleExtensionLite  ));
      assertEqualsExactType(true , message.getExtension(optionalBoolExtensionLite    ));
      assertEqualsExactType("115", message.getExtension(optionalStringExtensionLite  ));
      assertEqualsExactType(toBytes("116"), message.getExtension(optionalBytesExtensionLite));
  
      assertEqualsExactType(117, message.getExtension(optionalGroupExtensionLite         ).getA());
      assertEqualsExactType(118, message.getExtension(optionalNestedMessageExtensionLite ).getBb());
      assertEqualsExactType(119, message.getExtension(optionalForeignMessageExtensionLite).getC());
      assertEqualsExactType(120, message.getExtension(optionalImportMessageExtensionLite ).getD());
      assertEqualsExactType(126, message.getExtension(
          optionalPublicImportMessageExtensionLite).getE());
      assertEqualsExactType(127, message.getExtension(optionalLazyMessageExtensionLite).getBb());
  
      assertEqualsExactType(TestAllTypesLite.NestedEnum.BAZ,
        message.getExtension(optionalNestedEnumExtensionLite));
      assertEqualsExactType(ForeignEnumLite.FOREIGN_LITE_BAZ,
        message.getExtension(optionalForeignEnumExtensionLite));
      assertEqualsExactType(ImportEnumLite.IMPORT_LITE_BAZ,
        message.getExtension(optionalImportEnumExtensionLite));
  
      assertEqualsExactType("124", message.getExtension(optionalStringPieceExtensionLite));
      assertEqualsExactType("125", message.getExtension(optionalCordExtensionLite));
  
      // -----------------------------------------------------------------
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedInt32ExtensionLite   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedInt64ExtensionLite   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedUint32ExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedUint64ExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSint32ExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSint64ExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFixed32ExtensionLite ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFixed64ExtensionLite ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSfixed32ExtensionLite));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSfixed64ExtensionLite));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFloatExtensionLite   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedDoubleExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedBoolExtensionLite    ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedStringExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedBytesExtensionLite   ));
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedGroupExtensionLite         ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedNestedMessageExtensionLite ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedForeignMessageExtensionLite));
      Assert.assertEquals(2, message.getExtensionCount(repeatedImportMessageExtensionLite ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedLazyMessageExtensionLite   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedNestedEnumExtensionLite    ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedForeignEnumExtensionLite   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedImportEnumExtensionLite    ));
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedStringPieceExtensionLite));
      Assert.assertEquals(2, message.getExtensionCount(repeatedCordExtensionLite));
  
      assertEqualsExactType(201  , message.getExtension(repeatedInt32ExtensionLite   , 0));
      assertEqualsExactType(202L , message.getExtension(repeatedInt64ExtensionLite   , 0));
      assertEqualsExactType(203  , message.getExtension(repeatedUint32ExtensionLite  , 0));
      assertEqualsExactType(204L , message.getExtension(repeatedUint64ExtensionLite  , 0));
      assertEqualsExactType(205  , message.getExtension(repeatedSint32ExtensionLite  , 0));
      assertEqualsExactType(206L , message.getExtension(repeatedSint64ExtensionLite  , 0));
      assertEqualsExactType(207  , message.getExtension(repeatedFixed32ExtensionLite , 0));
      assertEqualsExactType(208L , message.getExtension(repeatedFixed64ExtensionLite , 0));
      assertEqualsExactType(209  , message.getExtension(repeatedSfixed32ExtensionLite, 0));
      assertEqualsExactType(210L , message.getExtension(repeatedSfixed64ExtensionLite, 0));
      assertEqualsExactType(211F , message.getExtension(repeatedFloatExtensionLite   , 0));
      assertEqualsExactType(212D , message.getExtension(repeatedDoubleExtensionLite  , 0));
      assertEqualsExactType(true , message.getExtension(repeatedBoolExtensionLite    , 0));
      assertEqualsExactType("215", message.getExtension(repeatedStringExtensionLite  , 0));
      assertEqualsExactType(toBytes("216"), message.getExtension(repeatedBytesExtensionLite, 0));
  
      assertEqualsExactType(217, message.getExtension(repeatedGroupExtensionLite         ,0).getA());
      assertEqualsExactType(218, message.getExtension(repeatedNestedMessageExtensionLite ,0).getBb());
      assertEqualsExactType(219, message.getExtension(repeatedForeignMessageExtensionLite,0).getC());
      assertEqualsExactType(220, message.getExtension(repeatedImportMessageExtensionLite ,0).getD());
      assertEqualsExactType(227, message.getExtension(repeatedLazyMessageExtensionLite   ,0).getBb());
  
      assertEqualsExactType(TestAllTypesLite.NestedEnum.BAR,
        message.getExtension(repeatedNestedEnumExtensionLite, 0));
      assertEqualsExactType(ForeignEnumLite.FOREIGN_LITE_BAR,
        message.getExtension(repeatedForeignEnumExtensionLite, 0));
      assertEqualsExactType(ImportEnumLite.IMPORT_LITE_BAR,
        message.getExtension(repeatedImportEnumExtensionLite, 0));
  
      assertEqualsExactType("224", message.getExtension(repeatedStringPieceExtensionLite, 0));
      assertEqualsExactType("225", message.getExtension(repeatedCordExtensionLite, 0));
  
      assertEqualsExactType(301  , message.getExtension(repeatedInt32ExtensionLite   , 1));
      assertEqualsExactType(302L , message.getExtension(repeatedInt64ExtensionLite   , 1));
      assertEqualsExactType(303  , message.getExtension(repeatedUint32ExtensionLite  , 1));
      assertEqualsExactType(304L , message.getExtension(repeatedUint64ExtensionLite  , 1));
      assertEqualsExactType(305  , message.getExtension(repeatedSint32ExtensionLite  , 1));
      assertEqualsExactType(306L , message.getExtension(repeatedSint64ExtensionLite  , 1));
      assertEqualsExactType(307  , message.getExtension(repeatedFixed32ExtensionLite , 1));
      assertEqualsExactType(308L , message.getExtension(repeatedFixed64ExtensionLite , 1));
      assertEqualsExactType(309  , message.getExtension(repeatedSfixed32ExtensionLite, 1));
      assertEqualsExactType(310L , message.getExtension(repeatedSfixed64ExtensionLite, 1));
      assertEqualsExactType(311F , message.getExtension(repeatedFloatExtensionLite   , 1));
      assertEqualsExactType(312D , message.getExtension(repeatedDoubleExtensionLite  , 1));
      assertEqualsExactType(false, message.getExtension(repeatedBoolExtensionLite    , 1));
      assertEqualsExactType("315", message.getExtension(repeatedStringExtensionLite  , 1));
      assertEqualsExactType(toBytes("316"), message.getExtension(repeatedBytesExtensionLite, 1));
  
      assertEqualsExactType(317, message.getExtension(repeatedGroupExtensionLite         ,1).getA());
      assertEqualsExactType(318, message.getExtension(repeatedNestedMessageExtensionLite ,1).getBb());
      assertEqualsExactType(319, message.getExtension(repeatedForeignMessageExtensionLite,1).getC());
      assertEqualsExactType(320, message.getExtension(repeatedImportMessageExtensionLite ,1).getD());
      assertEqualsExactType(327, message.getExtension(repeatedLazyMessageExtensionLite   ,1).getBb());
  
      assertEqualsExactType(TestAllTypesLite.NestedEnum.BAZ,
        message.getExtension(repeatedNestedEnumExtensionLite, 1));
      assertEqualsExactType(ForeignEnumLite.FOREIGN_LITE_BAZ,
        message.getExtension(repeatedForeignEnumExtensionLite, 1));
      assertEqualsExactType(ImportEnumLite.IMPORT_LITE_BAZ,
        message.getExtension(repeatedImportEnumExtensionLite, 1));
  
      assertEqualsExactType("324", message.getExtension(repeatedStringPieceExtensionLite, 1));
      assertEqualsExactType("325", message.getExtension(repeatedCordExtensionLite, 1));
  
      // -----------------------------------------------------------------
  
      Assert.assertTrue(message.hasExtension(defaultInt32ExtensionLite   ));
      Assert.assertTrue(message.hasExtension(defaultInt64ExtensionLite   ));
      Assert.assertTrue(message.hasExtension(defaultUint32ExtensionLite  ));
      Assert.assertTrue(message.hasExtension(defaultUint64ExtensionLite  ));
      Assert.assertTrue(message.hasExtension(defaultSint32ExtensionLite  ));
      Assert.assertTrue(message.hasExtension(defaultSint64ExtensionLite  ));
      Assert.assertTrue(message.hasExtension(defaultFixed32ExtensionLite ));
      Assert.assertTrue(message.hasExtension(defaultFixed64ExtensionLite ));
      Assert.assertTrue(message.hasExtension(defaultSfixed32ExtensionLite));
      Assert.assertTrue(message.hasExtension(defaultSfixed64ExtensionLite));
      Assert.assertTrue(message.hasExtension(defaultFloatExtensionLite   ));
      Assert.assertTrue(message.hasExtension(defaultDoubleExtensionLite  ));
      Assert.assertTrue(message.hasExtension(defaultBoolExtensionLite    ));
      Assert.assertTrue(message.hasExtension(defaultStringExtensionLite  ));
      Assert.assertTrue(message.hasExtension(defaultBytesExtensionLite   ));
  
      Assert.assertTrue(message.hasExtension(defaultNestedEnumExtensionLite ));
      Assert.assertTrue(message.hasExtension(defaultForeignEnumExtensionLite));
      Assert.assertTrue(message.hasExtension(defaultImportEnumExtensionLite ));
  
      Assert.assertTrue(message.hasExtension(defaultStringPieceExtensionLite));
      Assert.assertTrue(message.hasExtension(defaultCordExtensionLite));
  
      assertEqualsExactType(401  , message.getExtension(defaultInt32ExtensionLite   ));
      assertEqualsExactType(402L , message.getExtension(defaultInt64ExtensionLite   ));
      assertEqualsExactType(403  , message.getExtension(defaultUint32ExtensionLite  ));
      assertEqualsExactType(404L , message.getExtension(defaultUint64ExtensionLite  ));
      assertEqualsExactType(405  , message.getExtension(defaultSint32ExtensionLite  ));
      assertEqualsExactType(406L , message.getExtension(defaultSint64ExtensionLite  ));
      assertEqualsExactType(407  , message.getExtension(defaultFixed32ExtensionLite ));
      assertEqualsExactType(408L , message.getExtension(defaultFixed64ExtensionLite ));
      assertEqualsExactType(409  , message.getExtension(defaultSfixed32ExtensionLite));
      assertEqualsExactType(410L , message.getExtension(defaultSfixed64ExtensionLite));
      assertEqualsExactType(411F , message.getExtension(defaultFloatExtensionLite   ));
      assertEqualsExactType(412D , message.getExtension(defaultDoubleExtensionLite  ));
      assertEqualsExactType(false, message.getExtension(defaultBoolExtensionLite    ));
      assertEqualsExactType("415", message.getExtension(defaultStringExtensionLite  ));
      assertEqualsExactType(toBytes("416"), message.getExtension(defaultBytesExtensionLite));
  
      assertEqualsExactType(TestAllTypesLite.NestedEnum.FOO,
        message.getExtension(defaultNestedEnumExtensionLite ));
      assertEqualsExactType(ForeignEnumLite.FOREIGN_LITE_FOO,
        message.getExtension(defaultForeignEnumExtensionLite));
      assertEqualsExactType(ImportEnumLite.IMPORT_LITE_FOO,
        message.getExtension(defaultImportEnumExtensionLite));
  
      assertEqualsExactType("424", message.getExtension(defaultStringPieceExtensionLite));
      assertEqualsExactType("425", message.getExtension(defaultCordExtensionLite));
  
      Assert.assertTrue(message.hasExtension(oneofBytesExtensionLite));
  
      assertEqualsExactType(toBytes("604"), message.getExtension(oneofBytesExtensionLite));
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all extensions of
     * {@code message} are cleared, and that getting the extensions returns their
     * default values.
     */
    public static void assertExtensionsClear(
        TestAllExtensionsLiteOrBuilder message) {
      // hasBlah() should initially be false for all optional fields.
      Assert.assertFalse(message.hasExtension(optionalInt32ExtensionLite   ));
      Assert.assertFalse(message.hasExtension(optionalInt64ExtensionLite   ));
      Assert.assertFalse(message.hasExtension(optionalUint32ExtensionLite  ));
      Assert.assertFalse(message.hasExtension(optionalUint64ExtensionLite  ));
      Assert.assertFalse(message.hasExtension(optionalSint32ExtensionLite  ));
      Assert.assertFalse(message.hasExtension(optionalSint64ExtensionLite  ));
      Assert.assertFalse(message.hasExtension(optionalFixed32ExtensionLite ));
      Assert.assertFalse(message.hasExtension(optionalFixed64ExtensionLite ));
      Assert.assertFalse(message.hasExtension(optionalSfixed32ExtensionLite));
      Assert.assertFalse(message.hasExtension(optionalSfixed64ExtensionLite));
      Assert.assertFalse(message.hasExtension(optionalFloatExtensionLite   ));
      Assert.assertFalse(message.hasExtension(optionalDoubleExtensionLite  ));
      Assert.assertFalse(message.hasExtension(optionalBoolExtensionLite    ));
      Assert.assertFalse(message.hasExtension(optionalStringExtensionLite  ));
      Assert.assertFalse(message.hasExtension(optionalBytesExtensionLite   ));
  
      Assert.assertFalse(message.hasExtension(optionalGroupExtensionLite              ));
      Assert.assertFalse(message.hasExtension(optionalNestedMessageExtensionLite      ));
      Assert.assertFalse(message.hasExtension(optionalForeignMessageExtensionLite     ));
      Assert.assertFalse(message.hasExtension(optionalImportMessageExtensionLite      ));
      Assert.assertFalse(message.hasExtension(optionalPublicImportMessageExtensionLite));
      Assert.assertFalse(message.hasExtension(optionalLazyMessageExtensionLite        ));
  
      Assert.assertFalse(message.hasExtension(optionalNestedEnumExtensionLite ));
      Assert.assertFalse(message.hasExtension(optionalForeignEnumExtensionLite));
      Assert.assertFalse(message.hasExtension(optionalImportEnumExtensionLite ));
  
      Assert.assertFalse(message.hasExtension(optionalStringPieceExtensionLite));
      Assert.assertFalse(message.hasExtension(optionalCordExtensionLite));
  
      // Optional fields without defaults are set to zero or something like it.
      assertEqualsExactType(0    , message.getExtension(optionalInt32ExtensionLite   ));
      assertEqualsExactType(0L   , message.getExtension(optionalInt64ExtensionLite   ));
      assertEqualsExactType(0    , message.getExtension(optionalUint32ExtensionLite  ));
      assertEqualsExactType(0L   , message.getExtension(optionalUint64ExtensionLite  ));
      assertEqualsExactType(0    , message.getExtension(optionalSint32ExtensionLite  ));
      assertEqualsExactType(0L   , message.getExtension(optionalSint64ExtensionLite  ));
      assertEqualsExactType(0    , message.getExtension(optionalFixed32ExtensionLite ));
      assertEqualsExactType(0L   , message.getExtension(optionalFixed64ExtensionLite ));
      assertEqualsExactType(0    , message.getExtension(optionalSfixed32ExtensionLite));
      assertEqualsExactType(0L   , message.getExtension(optionalSfixed64ExtensionLite));
      assertEqualsExactType(0F   , message.getExtension(optionalFloatExtensionLite   ));
      assertEqualsExactType(0D   , message.getExtension(optionalDoubleExtensionLite  ));
      assertEqualsExactType(false, message.getExtension(optionalBoolExtensionLite    ));
      assertEqualsExactType(""   , message.getExtension(optionalStringExtensionLite  ));
      assertEqualsExactType(ByteString.EMPTY, message.getExtension(optionalBytesExtensionLite));
  
      // Embedded messages should also be clear.
      Assert.assertFalse(message.getExtension(optionalGroupExtensionLite              ).hasA());
      Assert.assertFalse(message.getExtension(optionalNestedMessageExtensionLite      ).hasBb());
      Assert.assertFalse(message.getExtension(optionalForeignMessageExtensionLite     ).hasC());
      Assert.assertFalse(message.getExtension(optionalImportMessageExtensionLite      ).hasD());
      Assert.assertFalse(message.getExtension(optionalPublicImportMessageExtensionLite).hasE());
      Assert.assertFalse(message.getExtension(optionalLazyMessageExtensionLite        ).hasBb());
  
      assertEqualsExactType(0, message.getExtension(optionalGroupExtensionLite         ).getA());
      assertEqualsExactType(0, message.getExtension(optionalNestedMessageExtensionLite ).getBb());
      assertEqualsExactType(0, message.getExtension(optionalForeignMessageExtensionLite).getC());
      assertEqualsExactType(0, message.getExtension(optionalImportMessageExtensionLite ).getD());
      assertEqualsExactType(0, message.getExtension(
          optionalPublicImportMessageExtensionLite).getE());
      assertEqualsExactType(0, message.getExtension(optionalLazyMessageExtensionLite   ).getBb());
  
      // Enums without defaults are set to the first value in the enum.
      assertEqualsExactType(TestAllTypesLite.NestedEnum.FOO,
        message.getExtension(optionalNestedEnumExtensionLite ));
      assertEqualsExactType(ForeignEnumLite.FOREIGN_LITE_FOO,
        message.getExtension(optionalForeignEnumExtensionLite));
      assertEqualsExactType(ImportEnumLite.IMPORT_LITE_FOO,
        message.getExtension(optionalImportEnumExtensionLite));
  
      assertEqualsExactType("", message.getExtension(optionalStringPieceExtensionLite));
      assertEqualsExactType("", message.getExtension(optionalCordExtensionLite));
  
      // Repeated fields are empty.
      Assert.assertEquals(0, message.getExtensionCount(repeatedInt32ExtensionLite   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedInt64ExtensionLite   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedUint32ExtensionLite  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedUint64ExtensionLite  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedSint32ExtensionLite  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedSint64ExtensionLite  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedFixed32ExtensionLite ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedFixed64ExtensionLite ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedSfixed32ExtensionLite));
      Assert.assertEquals(0, message.getExtensionCount(repeatedSfixed64ExtensionLite));
      Assert.assertEquals(0, message.getExtensionCount(repeatedFloatExtensionLite   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedDoubleExtensionLite  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedBoolExtensionLite    ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedStringExtensionLite  ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedBytesExtensionLite   ));
  
      Assert.assertEquals(0, message.getExtensionCount(repeatedGroupExtensionLite         ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedNestedMessageExtensionLite ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedForeignMessageExtensionLite));
      Assert.assertEquals(0, message.getExtensionCount(repeatedImportMessageExtensionLite ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedLazyMessageExtensionLite   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedNestedEnumExtensionLite    ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedForeignEnumExtensionLite   ));
      Assert.assertEquals(0, message.getExtensionCount(repeatedImportEnumExtensionLite    ));
  
      Assert.assertEquals(0, message.getExtensionCount(repeatedStringPieceExtensionLite));
      Assert.assertEquals(0, message.getExtensionCount(repeatedCordExtensionLite));
  
      // hasBlah() should also be false for all default fields.
      Assert.assertFalse(message.hasExtension(defaultInt32ExtensionLite   ));
      Assert.assertFalse(message.hasExtension(defaultInt64ExtensionLite   ));
      Assert.assertFalse(message.hasExtension(defaultUint32ExtensionLite  ));
      Assert.assertFalse(message.hasExtension(defaultUint64ExtensionLite  ));
      Assert.assertFalse(message.hasExtension(defaultSint32ExtensionLite  ));
      Assert.assertFalse(message.hasExtension(defaultSint64ExtensionLite  ));
      Assert.assertFalse(message.hasExtension(defaultFixed32ExtensionLite ));
      Assert.assertFalse(message.hasExtension(defaultFixed64ExtensionLite ));
      Assert.assertFalse(message.hasExtension(defaultSfixed32ExtensionLite));
      Assert.assertFalse(message.hasExtension(defaultSfixed64ExtensionLite));
      Assert.assertFalse(message.hasExtension(defaultFloatExtensionLite   ));
      Assert.assertFalse(message.hasExtension(defaultDoubleExtensionLite  ));
      Assert.assertFalse(message.hasExtension(defaultBoolExtensionLite    ));
      Assert.assertFalse(message.hasExtension(defaultStringExtensionLite  ));
      Assert.assertFalse(message.hasExtension(defaultBytesExtensionLite   ));
  
      Assert.assertFalse(message.hasExtension(defaultNestedEnumExtensionLite ));
      Assert.assertFalse(message.hasExtension(defaultForeignEnumExtensionLite));
      Assert.assertFalse(message.hasExtension(defaultImportEnumExtensionLite ));
  
      Assert.assertFalse(message.hasExtension(defaultStringPieceExtensionLite));
      Assert.assertFalse(message.hasExtension(defaultCordExtensionLite));
  
      // Fields with defaults have their default values (duh).
      assertEqualsExactType( 41    , message.getExtension(defaultInt32ExtensionLite   ));
      assertEqualsExactType( 42L   , message.getExtension(defaultInt64ExtensionLite   ));
      assertEqualsExactType( 43    , message.getExtension(defaultUint32ExtensionLite  ));
      assertEqualsExactType( 44L   , message.getExtension(defaultUint64ExtensionLite  ));
      assertEqualsExactType(-45    , message.getExtension(defaultSint32ExtensionLite  ));
      assertEqualsExactType( 46L   , message.getExtension(defaultSint64ExtensionLite  ));
      assertEqualsExactType( 47    , message.getExtension(defaultFixed32ExtensionLite ));
      assertEqualsExactType( 48L   , message.getExtension(defaultFixed64ExtensionLite ));
      assertEqualsExactType( 49    , message.getExtension(defaultSfixed32ExtensionLite));
      assertEqualsExactType(-50L   , message.getExtension(defaultSfixed64ExtensionLite));
      assertEqualsExactType( 51.5F , message.getExtension(defaultFloatExtensionLite   ));
      assertEqualsExactType( 52e3D , message.getExtension(defaultDoubleExtensionLite  ));
      assertEqualsExactType(true   , message.getExtension(defaultBoolExtensionLite    ));
      assertEqualsExactType("hello", message.getExtension(defaultStringExtensionLite  ));
      assertEqualsExactType(toBytes("world"), message.getExtension(defaultBytesExtensionLite));
  
      assertEqualsExactType(TestAllTypesLite.NestedEnum.BAR,
        message.getExtension(defaultNestedEnumExtensionLite ));
      assertEqualsExactType(ForeignEnumLite.FOREIGN_LITE_BAR,
        message.getExtension(defaultForeignEnumExtensionLite));
      assertEqualsExactType(ImportEnumLite.IMPORT_LITE_BAR,
        message.getExtension(defaultImportEnumExtensionLite));
  
      assertEqualsExactType("abc", message.getExtension(defaultStringPieceExtensionLite));
      assertEqualsExactType("123", message.getExtension(defaultCordExtensionLite));
  
      Assert.assertFalse(message.hasExtension(oneofUint32ExtensionLite));
      Assert.assertFalse(message.hasExtension(oneofNestedMessageExtensionLite));
      Assert.assertFalse(message.hasExtension(oneofStringExtensionLite));
      Assert.assertFalse(message.hasExtension(oneofBytesExtensionLite));
    }
  
    // -------------------------------------------------------------------
  
    /**
     * Assert (using {@code junit.framework.Assert}} that all extensions of
     * {@code message} are set to the values assigned by {@code setAllExtensions}
     * followed by {@code modifyRepeatedExtensions}.
     */
    public static void assertRepeatedExtensionsModified(
        TestAllExtensionsLiteOrBuilder message) {
      // ModifyRepeatedFields only sets the second repeated element of each
      // field.  In addition to verifying this, we also verify that the first
      // element and size were *not* modified.
      Assert.assertEquals(2, message.getExtensionCount(repeatedInt32ExtensionLite   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedInt64ExtensionLite   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedUint32ExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedUint64ExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSint32ExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSint64ExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFixed32ExtensionLite ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFixed64ExtensionLite ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSfixed32ExtensionLite));
      Assert.assertEquals(2, message.getExtensionCount(repeatedSfixed64ExtensionLite));
      Assert.assertEquals(2, message.getExtensionCount(repeatedFloatExtensionLite   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedDoubleExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedBoolExtensionLite    ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedStringExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedBytesExtensionLite   ));
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedGroupExtensionLite         ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedNestedMessageExtensionLite ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedForeignMessageExtensionLite));
      Assert.assertEquals(2, message.getExtensionCount(repeatedImportMessageExtensionLite ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedLazyMessageExtensionLite   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedNestedEnumExtensionLite    ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedForeignEnumExtensionLite   ));
      Assert.assertEquals(2, message.getExtensionCount(repeatedImportEnumExtensionLite    ));
  
      Assert.assertEquals(2, message.getExtensionCount(repeatedStringPieceExtensionLite));
      Assert.assertEquals(2, message.getExtensionCount(repeatedCordExtensionLite));
  
      assertEqualsExactType(201  , message.getExtension(repeatedInt32ExtensionLite   , 0));
      assertEqualsExactType(202L , message.getExtension(repeatedInt64ExtensionLite   , 0));
      assertEqualsExactType(203  , message.getExtension(repeatedUint32ExtensionLite  , 0));
      assertEqualsExactType(204L , message.getExtension(repeatedUint64ExtensionLite  , 0));
      assertEqualsExactType(205  , message.getExtension(repeatedSint32ExtensionLite  , 0));
      assertEqualsExactType(206L , message.getExtension(repeatedSint64ExtensionLite  , 0));
      assertEqualsExactType(207  , message.getExtension(repeatedFixed32ExtensionLite , 0));
      assertEqualsExactType(208L , message.getExtension(repeatedFixed64ExtensionLite , 0));
      assertEqualsExactType(209  , message.getExtension(repeatedSfixed32ExtensionLite, 0));
      assertEqualsExactType(210L , message.getExtension(repeatedSfixed64ExtensionLite, 0));
      assertEqualsExactType(211F , message.getExtension(repeatedFloatExtensionLite   , 0));
      assertEqualsExactType(212D , message.getExtension(repeatedDoubleExtensionLite  , 0));
      assertEqualsExactType(true , message.getExtension(repeatedBoolExtensionLite    , 0));
      assertEqualsExactType("215", message.getExtension(repeatedStringExtensionLite  , 0));
      assertEqualsExactType(toBytes("216"), message.getExtension(repeatedBytesExtensionLite, 0));
  
      assertEqualsExactType(217, message.getExtension(repeatedGroupExtensionLite         ,0).getA());
      assertEqualsExactType(218, message.getExtension(repeatedNestedMessageExtensionLite ,0).getBb());
      assertEqualsExactType(219, message.getExtension(repeatedForeignMessageExtensionLite,0).getC());
      assertEqualsExactType(220, message.getExtension(repeatedImportMessageExtensionLite ,0).getD());
      assertEqualsExactType(227, message.getExtension(repeatedLazyMessageExtensionLite   ,0).getBb());
  
      assertEqualsExactType(TestAllTypesLite.NestedEnum.BAR,
        message.getExtension(repeatedNestedEnumExtensionLite, 0));
      assertEqualsExactType(ForeignEnumLite.FOREIGN_LITE_BAR,
        message.getExtension(repeatedForeignEnumExtensionLite, 0));
      assertEqualsExactType(ImportEnumLite.IMPORT_LITE_BAR,
        message.getExtension(repeatedImportEnumExtensionLite, 0));
  
      assertEqualsExactType("224", message.getExtension(repeatedStringPieceExtensionLite, 0));
      assertEqualsExactType("225", message.getExtension(repeatedCordExtensionLite, 0));
  
      // Actually verify the second (modified) elements now.
      assertEqualsExactType(501  , message.getExtension(repeatedInt32ExtensionLite   , 1));
      assertEqualsExactType(502L , message.getExtension(repeatedInt64ExtensionLite   , 1));
      assertEqualsExactType(503  , message.getExtension(repeatedUint32ExtensionLite  , 1));
      assertEqualsExactType(504L , message.getExtension(repeatedUint64ExtensionLite  , 1));
      assertEqualsExactType(505  , message.getExtension(repeatedSint32ExtensionLite  , 1));
      assertEqualsExactType(506L , message.getExtension(repeatedSint64ExtensionLite  , 1));
      assertEqualsExactType(507  , message.getExtension(repeatedFixed32ExtensionLite , 1));
      assertEqualsExactType(508L , message.getExtension(repeatedFixed64ExtensionLite , 1));
      assertEqualsExactType(509  , message.getExtension(repeatedSfixed32ExtensionLite, 1));
      assertEqualsExactType(510L , message.getExtension(repeatedSfixed64ExtensionLite, 1));
      assertEqualsExactType(511F , message.getExtension(repeatedFloatExtensionLite   , 1));
      assertEqualsExactType(512D , message.getExtension(repeatedDoubleExtensionLite  , 1));
      assertEqualsExactType(true , message.getExtension(repeatedBoolExtensionLite    , 1));
      assertEqualsExactType("515", message.getExtension(repeatedStringExtensionLite  , 1));
      assertEqualsExactType(toBytes("516"), message.getExtension(repeatedBytesExtensionLite, 1));
  
      assertEqualsExactType(517, message.getExtension(repeatedGroupExtensionLite         ,1).getA());
      assertEqualsExactType(518, message.getExtension(repeatedNestedMessageExtensionLite ,1).getBb());
      assertEqualsExactType(519, message.getExtension(repeatedForeignMessageExtensionLite,1).getC());
      assertEqualsExactType(520, message.getExtension(repeatedImportMessageExtensionLite ,1).getD());
      assertEqualsExactType(527, message.getExtension(repeatedLazyMessageExtensionLite   ,1).getBb());
  
      assertEqualsExactType(TestAllTypesLite.NestedEnum.FOO,
        message.getExtension(repeatedNestedEnumExtensionLite, 1));
      assertEqualsExactType(ForeignEnumLite.FOREIGN_LITE_FOO,
        message.getExtension(repeatedForeignEnumExtensionLite, 1));
      assertEqualsExactType(ImportEnumLite.IMPORT_LITE_FOO,
        message.getExtension(repeatedImportEnumExtensionLite, 1));
  
      assertEqualsExactType("524", message.getExtension(repeatedStringPieceExtensionLite, 1));
      assertEqualsExactType("525", message.getExtension(repeatedCordExtensionLite, 1));
    }
  
    public static void assertPackedExtensionsSet(TestPackedExtensionsLite message) {
      Assert.assertEquals(2, message.getExtensionCount(packedInt32ExtensionLite   ));
      Assert.assertEquals(2, message.getExtensionCount(packedInt64ExtensionLite   ));
      Assert.assertEquals(2, message.getExtensionCount(packedUint32ExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(packedUint64ExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(packedSint32ExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(packedSint64ExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(packedFixed32ExtensionLite ));
      Assert.assertEquals(2, message.getExtensionCount(packedFixed64ExtensionLite ));
      Assert.assertEquals(2, message.getExtensionCount(packedSfixed32ExtensionLite));
      Assert.assertEquals(2, message.getExtensionCount(packedSfixed64ExtensionLite));
      Assert.assertEquals(2, message.getExtensionCount(packedFloatExtensionLite   ));
      Assert.assertEquals(2, message.getExtensionCount(packedDoubleExtensionLite  ));
      Assert.assertEquals(2, message.getExtensionCount(packedBoolExtensionLite    ));
      Assert.assertEquals(2, message.getExtensionCount(packedEnumExtensionLite));
      assertEqualsExactType(601  , message.getExtension(packedInt32ExtensionLite   , 0));
      assertEqualsExactType(602L , message.getExtension(packedInt64ExtensionLite   , 0));
      assertEqualsExactType(603  , message.getExtension(packedUint32ExtensionLite  , 0));
      assertEqualsExactType(604L , message.getExtension(packedUint64ExtensionLite  , 0));
      assertEqualsExactType(605  , message.getExtension(packedSint32ExtensionLite  , 0));
      assertEqualsExactType(606L , message.getExtension(packedSint64ExtensionLite  , 0));
      assertEqualsExactType(607  , message.getExtension(packedFixed32ExtensionLite , 0));
      assertEqualsExactType(608L , message.getExtension(packedFixed64ExtensionLite , 0));
      assertEqualsExactType(609  , message.getExtension(packedSfixed32ExtensionLite, 0));
      assertEqualsExactType(610L , message.getExtension(packedSfixed64ExtensionLite, 0));
      assertEqualsExactType(611F , message.getExtension(packedFloatExtensionLite   , 0));
      assertEqualsExactType(612D , message.getExtension(packedDoubleExtensionLite  , 0));
      assertEqualsExactType(true , message.getExtension(packedBoolExtensionLite    , 0));
      assertEqualsExactType(ForeignEnumLite.FOREIGN_LITE_BAR,
                            message.getExtension(packedEnumExtensionLite, 0));
      assertEqualsExactType(701  , message.getExtension(packedInt32ExtensionLite   , 1));
      assertEqualsExactType(702L , message.getExtension(packedInt64ExtensionLite   , 1));
      assertEqualsExactType(703  , message.getExtension(packedUint32ExtensionLite  , 1));
      assertEqualsExactType(704L , message.getExtension(packedUint64ExtensionLite  , 1));
      assertEqualsExactType(705  , message.getExtension(packedSint32ExtensionLite  , 1));
      assertEqualsExactType(706L , message.getExtension(packedSint64ExtensionLite  , 1));
      assertEqualsExactType(707  , message.getExtension(packedFixed32ExtensionLite , 1));
      assertEqualsExactType(708L , message.getExtension(packedFixed64ExtensionLite , 1));
      assertEqualsExactType(709  , message.getExtension(packedSfixed32ExtensionLite, 1));
      assertEqualsExactType(710L , message.getExtension(packedSfixed64ExtensionLite, 1));
      assertEqualsExactType(711F , message.getExtension(packedFloatExtensionLite   , 1));
      assertEqualsExactType(712D , message.getExtension(packedDoubleExtensionLite  , 1));
      assertEqualsExactType(false, message.getExtension(packedBoolExtensionLite    , 1));
      assertEqualsExactType(ForeignEnumLite.FOREIGN_LITE_BAZ,
                            message.getExtension(packedEnumExtensionLite, 1));
    }
  
    // ===================================================================
    // oneof
    public static void setOneof(TestOneof2.Builder message) {
      message.setFooLazyMessage(
          TestOneof2.NestedMessage.newBuilder().setQuxInt(100).build());
      message.setBarString("101");
      message.setBazInt(102);
      message.setBazString("103");
    }
  
    public static void assertOneofSet(TestOneof2 message) {
      Assert.assertTrue(message.hasFooLazyMessage            ());
      Assert.assertTrue(message.getFooLazyMessage().hasQuxInt());
  
      Assert.assertTrue(message.hasBarString());
      Assert.assertTrue(message.hasBazInt   ());
      Assert.assertTrue(message.hasBazString());
  
      Assert.assertEquals(100  , message.getFooLazyMessage().getQuxInt());
      Assert.assertEquals("101", message.getBarString                 ());
      Assert.assertEquals(102  , message.getBazInt                    ());
      Assert.assertEquals("103", message.getBazString                 ());
    }
  
    public static void assertAtMostOneFieldSetOneof(TestOneof2 message) {
      int count = 0;
      if (message.hasFooInt()) { ++count; }
      if (message.hasFooString()) { ++count; }
      if (message.hasFooCord()) { ++count; }
      if (message.hasFooStringPiece()) { ++count; }
      if (message.hasFooBytes()) { ++count; }
      if (message.hasFooEnum()) { ++count; }
      if (message.hasFooMessage()) { ++count; }
      if (message.hasFooGroup()) { ++count; }
      if (message.hasFooLazyMessage()) { ++count; }
      Assert.assertTrue(count <= 1);
  
      count = 0;
      if (message.hasBarInt()) { ++count; }
      if (message.hasBarString()) { ++count; }
      if (message.hasBarCord()) { ++count; }
      if (message.hasBarStringPiece()) { ++count; }
      if (message.hasBarBytes()) { ++count; }
      if (message.hasBarEnum()) { ++count; }
      Assert.assertTrue(count <= 1);
  
      switch (message.getFooCase()) {
        case FOO_INT:
          Assert.assertTrue(message.hasFooInt());
          break;
        case FOO_STRING:
          Assert.assertTrue(message.hasFooString());
          break;
        case FOO_CORD:
          Assert.assertTrue(message.hasFooCord());
          break;
        case FOO_STRING_PIECE:
          Assert.assertTrue(message.hasFooStringPiece());
          break;
        case FOO_BYTES:
          Assert.assertTrue(message.hasFooBytes());
          break;
        case FOO_ENUM:
          Assert.assertTrue(message.hasFooEnum());
          break;
        case FOO_MESSAGE:
          Assert.assertTrue(message.hasFooMessage());
          break;
        case FOOGROUP:
          Assert.assertTrue(message.hasFooGroup());
          break;
        case FOO_LAZY_MESSAGE:
          Assert.assertTrue(message.hasFooLazyMessage());
          break;
        case FOO_NOT_SET:
          break;
        default:
          // TODO(b/18683919): go/enum-switch-lsc
      }
    }
  
    // =================================================================
  
    /**
     * Performs the same things that the methods of {@code TestUtil} do, but
     * via the reflection interface.  This is its own class because it needs
     * to know what descriptor to use.
     */
    public static class ReflectionTester {
      private final Descriptors.Descriptor baseDescriptor;
      private final ExtensionRegistry extensionRegistry;
  
      private final Descriptors.FileDescriptor file;
      private final Descriptors.FileDescriptor importFile;
      private final Descriptors.FileDescriptor publicImportFile;
  
      private final Descriptors.Descriptor optionalGroup;
      private final Descriptors.Descriptor repeatedGroup;
      private final Descriptors.Descriptor nestedMessage;
      private final Descriptors.Descriptor foreignMessage;
      private final Descriptors.Descriptor importMessage;
      private final Descriptors.Descriptor publicImportMessage;
  
      private final Descriptors.FieldDescriptor groupA;
      private final Descriptors.FieldDescriptor repeatedGroupA;
      private final Descriptors.FieldDescriptor nestedB;
      private final Descriptors.FieldDescriptor foreignC;
      private final Descriptors.FieldDescriptor importD;
      private final Descriptors.FieldDescriptor importE;
  
      private final Descriptors.EnumDescriptor nestedEnum;
      private final Descriptors.EnumDescriptor foreignEnum;
      private final Descriptors.EnumDescriptor importEnum;
  
      private final Descriptors.EnumValueDescriptor nestedFoo;
      private final Descriptors.EnumValueDescriptor nestedBar;
      private final Descriptors.EnumValueDescriptor nestedBaz;
      private final Descriptors.EnumValueDescriptor foreignFoo;
      private final Descriptors.EnumValueDescriptor foreignBar;
      private final Descriptors.EnumValueDescriptor foreignBaz;
      private final Descriptors.EnumValueDescriptor importFoo;
      private final Descriptors.EnumValueDescriptor importBar;
      private final Descriptors.EnumValueDescriptor importBaz;
  
      /**
       * Construct a {@code ReflectionTester} that will expect messages using
       * the given descriptor.
       *
       * Normally {@code baseDescriptor} should be a descriptor for the type
       * {@code TestAllTypes}, defined in
       * {@code google/protobuf/unittest.proto}.  However, if
       * {@code extensionRegistry} is non-null, then {@code baseDescriptor} should
       * be for {@code TestAllExtensions} instead, and instead of reading and
       * writing normal fields, the tester will read and write extensions.
       * All of {@code TestAllExtensions}' extensions must be registered in the
       * registry.
       */
      public ReflectionTester(Descriptors.Descriptor baseDescriptor,
                              ExtensionRegistry extensionRegistry) {
        this.baseDescriptor = baseDescriptor;
        this.extensionRegistry = extensionRegistry;
  
        this.file = baseDescriptor.getFile();
        Assert.assertEquals(1, file.getDependencies().size());
        this.importFile = file.getDependencies().get(0);
        this.publicImportFile = importFile.getDependencies().get(0);
  
        Descriptors.Descriptor testAllTypes;
        if (baseDescriptor.getName() == "TestAllTypes") {
          testAllTypes = baseDescriptor;
        } else {
          testAllTypes = file.findMessageTypeByName("TestAllTypes");
          Assert.assertNotNull(testAllTypes);
        }
  
        if (extensionRegistry == null) {
          // Use testAllTypes, rather than baseDescriptor, to allow
          // initialization using TestPackedTypes descriptors. These objects
          // won't be used by the methods for packed fields.
          this.optionalGroup =
            testAllTypes.findNestedTypeByName("OptionalGroup");
          this.repeatedGroup =
            testAllTypes.findNestedTypeByName("RepeatedGroup");
        } else {
          this.optionalGroup =
            file.findMessageTypeByName("OptionalGroup_extension");
          this.repeatedGroup =
            file.findMessageTypeByName("RepeatedGroup_extension");
        }
        this.nestedMessage = testAllTypes.findNestedTypeByName("NestedMessage");
        this.foreignMessage = file.findMessageTypeByName("ForeignMessage");
        this.importMessage = importFile.findMessageTypeByName("ImportMessage");
        this.publicImportMessage = publicImportFile.findMessageTypeByName(
            "PublicImportMessage");
  
        this.nestedEnum = testAllTypes.findEnumTypeByName("NestedEnum");
        this.foreignEnum = file.findEnumTypeByName("ForeignEnum");
        this.importEnum = importFile.findEnumTypeByName("ImportEnum");
  
        Assert.assertNotNull(optionalGroup );
        Assert.assertNotNull(repeatedGroup );
        Assert.assertNotNull(nestedMessage );
        Assert.assertNotNull(foreignMessage);
        Assert.assertNotNull(importMessage );
        Assert.assertNotNull(nestedEnum    );
        Assert.assertNotNull(foreignEnum   );
        Assert.assertNotNull(importEnum    );
  
        this.nestedB  = nestedMessage .findFieldByName("bb");
        this.foreignC = foreignMessage.findFieldByName("c");
        this.importD  = importMessage .findFieldByName("d");
        this.importE  = publicImportMessage.findFieldByName("e");
        this.nestedFoo = nestedEnum.findValueByName("FOO");
        this.nestedBar = nestedEnum.findValueByName("BAR");
        this.nestedBaz = nestedEnum.findValueByName("BAZ");
        this.foreignFoo = foreignEnum.findValueByName("FOREIGN_FOO");
        this.foreignBar = foreignEnum.findValueByName("FOREIGN_BAR");
        this.foreignBaz = foreignEnum.findValueByName("FOREIGN_BAZ");
        this.importFoo = importEnum.findValueByName("IMPORT_FOO");
        this.importBar = importEnum.findValueByName("IMPORT_BAR");
        this.importBaz = importEnum.findValueByName("IMPORT_BAZ");
  
        this.groupA = optionalGroup.findFieldByName("a");
        this.repeatedGroupA = repeatedGroup.findFieldByName("a");
  
        Assert.assertNotNull(groupA        );
        Assert.assertNotNull(repeatedGroupA);
        Assert.assertNotNull(nestedB       );
        Assert.assertNotNull(foreignC      );
        Assert.assertNotNull(importD       );
        Assert.assertNotNull(importE       );
        Assert.assertNotNull(nestedFoo     );
        Assert.assertNotNull(nestedBar     );
        Assert.assertNotNull(nestedBaz     );
        Assert.assertNotNull(foreignFoo    );
        Assert.assertNotNull(foreignBar    );
        Assert.assertNotNull(foreignBaz    );
        Assert.assertNotNull(importFoo     );
        Assert.assertNotNull(importBar     );
        Assert.assertNotNull(importBaz     );
      }
  
      /**
       * Shorthand to get a FieldDescriptor for a field of unittest::TestAllTypes.
       */
      private Descriptors.FieldDescriptor f(String name) {
        Descriptors.FieldDescriptor result;
        if (extensionRegistry == null) {
          result = baseDescriptor.findFieldByName(name);
        } else {
          result = file.findExtensionByName(name + "_extension");
        }
        Assert.assertNotNull(result);
        return result;
      }
  
      /**
       * Calls {@code parent.newBuilderForField()} or uses the
       * {@code ExtensionRegistry} to find an appropriate builder, depending
       * on what type is being tested.
       */
      private Message.Builder newBuilderForField(
          Message.Builder parent, Descriptors.FieldDescriptor field) {
        if (extensionRegistry == null) {
          return parent.newBuilderForField(field);
        } else {
          ExtensionRegistry.ExtensionInfo extension =
            extensionRegistry.findImmutableExtensionByNumber(
                field.getContainingType(), field.getNumber());
          Assert.assertNotNull(extension);
          Assert.assertNotNull(extension.defaultInstance);
          return extension.defaultInstance.newBuilderForType();
        }
      }
  
      // -------------------------------------------------------------------
  
      /**
       * Set every field of {@code message} to the values expected by
       * {@code assertAllFieldsSet()}, using the {@link Message.Builder}
       * reflection interface.
       */
      void setAllFieldsViaReflection(Message.Builder message) {
        message.setField(f("optional_int32"   ), 101 );
        message.setField(f("optional_int64"   ), 102L);
        message.setField(f("optional_uint32"  ), 103 );
        message.setField(f("optional_uint64"  ), 104L);
        message.setField(f("optional_sint32"  ), 105 );
        message.setField(f("optional_sint64"  ), 106L);
        message.setField(f("optional_fixed32" ), 107 );
        message.setField(f("optional_fixed64" ), 108L);
        message.setField(f("optional_sfixed32"), 109 );
        message.setField(f("optional_sfixed64"), 110L);
        message.setField(f("optional_float"   ), 111F);
        message.setField(f("optional_double"  ), 112D);
        message.setField(f("optional_bool"    ), true);
        message.setField(f("optional_string"  ), "115");
        message.setField(f("optional_bytes"   ), toBytes("116"));
  
        message.setField(f("optionalgroup"),
          newBuilderForField(message, f("optionalgroup"))
                 .setField(groupA, 117).build());
        message.setField(f("optional_nested_message"),
          newBuilderForField(message, f("optional_nested_message"))
                 .setField(nestedB, 118).build());
        message.setField(f("optional_foreign_message"),
          newBuilderForField(message, f("optional_foreign_message"))
                 .setField(foreignC, 119).build());
        message.setField(f("optional_import_message"),
          newBuilderForField(message, f("optional_import_message"))
                 .setField(importD, 120).build());
        message.setField(f("optional_public_import_message"),
          newBuilderForField(message, f("optional_public_import_message"))
                 .setField(importE, 126).build());
        message.setField(f("optional_lazy_message"),
          newBuilderForField(message, f("optional_lazy_message"))
                 .setField(nestedB, 127).build());
  
        message.setField(f("optional_nested_enum" ),  nestedBaz);
        message.setField(f("optional_foreign_enum"), foreignBaz);
        message.setField(f("optional_import_enum" ),  importBaz);
  
        message.setField(f("optional_string_piece" ), "124");
        message.setField(f("optional_cord" ), "125");
  
        // -----------------------------------------------------------------
  
        message.addRepeatedField(f("repeated_int32"   ), 201 );
        message.addRepeatedField(f("repeated_int64"   ), 202L);
        message.addRepeatedField(f("repeated_uint32"  ), 203 );
        message.addRepeatedField(f("repeated_uint64"  ), 204L);
        message.addRepeatedField(f("repeated_sint32"  ), 205 );
        message.addRepeatedField(f("repeated_sint64"  ), 206L);
        message.addRepeatedField(f("repeated_fixed32" ), 207 );
        message.addRepeatedField(f("repeated_fixed64" ), 208L);
        message.addRepeatedField(f("repeated_sfixed32"), 209 );
        message.addRepeatedField(f("repeated_sfixed64"), 210L);
        message.addRepeatedField(f("repeated_float"   ), 211F);
        message.addRepeatedField(f("repeated_double"  ), 212D);
        message.addRepeatedField(f("repeated_bool"    ), true);
        message.addRepeatedField(f("repeated_string"  ), "215");
        message.addRepeatedField(f("repeated_bytes"   ), toBytes("216"));
  
        message.addRepeatedField(f("repeatedgroup"),
          newBuilderForField(message, f("repeatedgroup"))
                 .setField(repeatedGroupA, 217).build());
        message.addRepeatedField(f("repeated_nested_message"),
          newBuilderForField(message, f("repeated_nested_message"))
                 .setField(nestedB, 218).build());
        message.addRepeatedField(f("repeated_foreign_message"),
          newBuilderForField(message, f("repeated_foreign_message"))
                 .setField(foreignC, 219).build());
        message.addRepeatedField(f("repeated_import_message"),
          newBuilderForField(message, f("repeated_import_message"))
                 .setField(importD, 220).build());
        message.addRepeatedField(f("repeated_lazy_message"),
          newBuilderForField(message, f("repeated_lazy_message"))
                 .setField(nestedB, 227).build());
  
        message.addRepeatedField(f("repeated_nested_enum" ),  nestedBar);
        message.addRepeatedField(f("repeated_foreign_enum"), foreignBar);
        message.addRepeatedField(f("repeated_import_enum" ),  importBar);
  
        message.addRepeatedField(f("repeated_string_piece" ), "224");
        message.addRepeatedField(f("repeated_cord" ), "225");
  
        // Add a second one of each field.
        message.addRepeatedField(f("repeated_int32"   ), 301 );
        message.addRepeatedField(f("repeated_int64"   ), 302L);
        message.addRepeatedField(f("repeated_uint32"  ), 303 );
        message.addRepeatedField(f("repeated_uint64"  ), 304L);
        message.addRepeatedField(f("repeated_sint32"  ), 305 );
        message.addRepeatedField(f("repeated_sint64"  ), 306L);
        message.addRepeatedField(f("repeated_fixed32" ), 307 );
        message.addRepeatedField(f("repeated_fixed64" ), 308L);
        message.addRepeatedField(f("repeated_sfixed32"), 309 );
        message.addRepeatedField(f("repeated_sfixed64"), 310L);
        message.addRepeatedField(f("repeated_float"   ), 311F);
        message.addRepeatedField(f("repeated_double"  ), 312D);
        message.addRepeatedField(f("repeated_bool"    ), false);
        message.addRepeatedField(f("repeated_string"  ), "315");
        message.addRepeatedField(f("repeated_bytes"   ), toBytes("316"));
  
        message.addRepeatedField(f("repeatedgroup"),
          newBuilderForField(message, f("repeatedgroup"))
                 .setField(repeatedGroupA, 317).build());
        message.addRepeatedField(f("repeated_nested_message"),
          newBuilderForField(message, f("repeated_nested_message"))
                 .setField(nestedB, 318).build());
        message.addRepeatedField(f("repeated_foreign_message"),
          newBuilderForField(message, f("repeated_foreign_message"))
                 .setField(foreignC, 319).build());
        message.addRepeatedField(f("repeated_import_message"),
          newBuilderForField(message, f("repeated_import_message"))
                 .setField(importD, 320).build());
        message.addRepeatedField(f("repeated_lazy_message"),
          newBuilderForField(message, f("repeated_lazy_message"))
                 .setField(nestedB, 327).build());
  
        message.addRepeatedField(f("repeated_nested_enum" ),  nestedBaz);
        message.addRepeatedField(f("repeated_foreign_enum"), foreignBaz);
        message.addRepeatedField(f("repeated_import_enum" ),  importBaz);
  
        message.addRepeatedField(f("repeated_string_piece" ), "324");
        message.addRepeatedField(f("repeated_cord" ), "325");
  
        // -----------------------------------------------------------------
  
        message.setField(f("default_int32"   ), 401 );
        message.setField(f("default_int64"   ), 402L);
        message.setField(f("default_uint32"  ), 403 );
        message.setField(f("default_uint64"  ), 404L);
        message.setField(f("default_sint32"  ), 405 );
        message.setField(f("default_sint64"  ), 406L);
        message.setField(f("default_fixed32" ), 407 );
        message.setField(f("default_fixed64" ), 408L);
        message.setField(f("default_sfixed32"), 409 );
        message.setField(f("default_sfixed64"), 410L);
        message.setField(f("default_float"   ), 411F);
        message.setField(f("default_double"  ), 412D);
        message.setField(f("default_bool"    ), false);
        message.setField(f("default_string"  ), "415");
        message.setField(f("default_bytes"   ), toBytes("416"));
  
        message.setField(f("default_nested_enum" ),  nestedFoo);
        message.setField(f("default_foreign_enum"), foreignFoo);
        message.setField(f("default_import_enum" ),  importFoo);
  
        message.setField(f("default_string_piece" ), "424");
        message.setField(f("default_cord" ), "425");
  
        message.setField(f("oneof_uint32" ), 601);
        message.setField(f("oneof_nested_message"),
          newBuilderForField(message, f("oneof_nested_message"))
            .setField(nestedB, 602).build());
        message.setField(f("oneof_string" ), "603");
        message.setField(f("oneof_bytes" ), toBytes("604"));
      }
  
      // -------------------------------------------------------------------
  
      /**
       * Modify the repeated fields of {@code message} to contain the values
       * expected by {@code assertRepeatedFieldsModified()}, using the
       * {@link Message.Builder} reflection interface.
       */
      void modifyRepeatedFieldsViaReflection(Message.Builder message) {
        message.setRepeatedField(f("repeated_int32"   ), 1, 501 );
        message.setRepeatedField(f("repeated_int64"   ), 1, 502L);
        message.setRepeatedField(f("repeated_uint32"  ), 1, 503 );
        message.setRepeatedField(f("repeated_uint64"  ), 1, 504L);
        message.setRepeatedField(f("repeated_sint32"  ), 1, 505 );
        message.setRepeatedField(f("repeated_sint64"  ), 1, 506L);
        message.setRepeatedField(f("repeated_fixed32" ), 1, 507 );
        message.setRepeatedField(f("repeated_fixed64" ), 1, 508L);
        message.setRepeatedField(f("repeated_sfixed32"), 1, 509 );
        message.setRepeatedField(f("repeated_sfixed64"), 1, 510L);
        message.setRepeatedField(f("repeated_float"   ), 1, 511F);
        message.setRepeatedField(f("repeated_double"  ), 1, 512D);
        message.setRepeatedField(f("repeated_bool"    ), 1, true);
        message.setRepeatedField(f("repeated_string"  ), 1, "515");
        message.setRepeatedField(f("repeated_bytes"   ), 1, toBytes("516"));
  
        message.setRepeatedField(f("repeatedgroup"), 1,
          newBuilderForField(message, f("repeatedgroup"))
                 .setField(repeatedGroupA, 517).build());
        message.setRepeatedField(f("repeated_nested_message"), 1,
          newBuilderForField(message, f("repeated_nested_message"))
                 .setField(nestedB, 518).build());
        message.setRepeatedField(f("repeated_foreign_message"), 1,
          newBuilderForField(message, f("repeated_foreign_message"))
                 .setField(foreignC, 519).build());
        message.setRepeatedField(f("repeated_import_message"), 1,
          newBuilderForField(message, f("repeated_import_message"))
                 .setField(importD, 520).build());
        message.setRepeatedField(f("repeated_lazy_message"), 1,
          newBuilderForField(message, f("repeated_lazy_message"))
                 .setField(nestedB, 527).build());
  
        message.setRepeatedField(f("repeated_nested_enum" ), 1,  nestedFoo);
        message.setRepeatedField(f("repeated_foreign_enum"), 1, foreignFoo);
        message.setRepeatedField(f("repeated_import_enum" ), 1,  importFoo);
  
        message.setRepeatedField(f("repeated_string_piece"), 1, "524");
        message.setRepeatedField(f("repeated_cord"), 1, "525");
      }
  
      // -------------------------------------------------------------------
  
      /**
       * Assert (using {@code junit.framework.Assert}} that all fields of
       * {@code message} are set to the values assigned by {@code setAllFields},
       * using the {@link Message} reflection interface.
       */
      public void assertAllFieldsSetViaReflection(MessageOrBuilder message) {
        Assert.assertTrue(message.hasField(f("optional_int32"   )));
        Assert.assertTrue(message.hasField(f("optional_int64"   )));
        Assert.assertTrue(message.hasField(f("optional_uint32"  )));
        Assert.assertTrue(message.hasField(f("optional_uint64"  )));
        Assert.assertTrue(message.hasField(f("optional_sint32"  )));
        Assert.assertTrue(message.hasField(f("optional_sint64"  )));
        Assert.assertTrue(message.hasField(f("optional_fixed32" )));
        Assert.assertTrue(message.hasField(f("optional_fixed64" )));
        Assert.assertTrue(message.hasField(f("optional_sfixed32")));
        Assert.assertTrue(message.hasField(f("optional_sfixed64")));
        Assert.assertTrue(message.hasField(f("optional_float"   )));
        Assert.assertTrue(message.hasField(f("optional_double"  )));
        Assert.assertTrue(message.hasField(f("optional_bool"    )));
        Assert.assertTrue(message.hasField(f("optional_string"  )));
        Assert.assertTrue(message.hasField(f("optional_bytes"   )));
  
        Assert.assertTrue(message.hasField(f("optionalgroup"           )));
        Assert.assertTrue(message.hasField(f("optional_nested_message" )));
        Assert.assertTrue(message.hasField(f("optional_foreign_message")));
        Assert.assertTrue(message.hasField(f("optional_import_message" )));
  
        Assert.assertTrue(
          ((Message)message.getField(f("optionalgroup"))).hasField(groupA));
        Assert.assertTrue(
          ((Message)message.getField(f("optional_nested_message")))
                           .hasField(nestedB));
        Assert.assertTrue(
          ((Message)message.getField(f("optional_foreign_message")))
                           .hasField(foreignC));
        Assert.assertTrue(
          ((Message)message.getField(f("optional_import_message")))
                           .hasField(importD));
  
        Assert.assertTrue(message.hasField(f("optional_nested_enum" )));
        Assert.assertTrue(message.hasField(f("optional_foreign_enum")));
        Assert.assertTrue(message.hasField(f("optional_import_enum" )));
  
        Assert.assertTrue(message.hasField(f("optional_string_piece")));
        Assert.assertTrue(message.hasField(f("optional_cord")));
  
        Assert.assertEquals(101  , message.getField(f("optional_int32"   )));
        Assert.assertEquals(102L , message.getField(f("optional_int64"   )));
        Assert.assertEquals(103  , message.getField(f("optional_uint32"  )));
        Assert.assertEquals(104L , message.getField(f("optional_uint64"  )));
        Assert.assertEquals(105  , message.getField(f("optional_sint32"  )));
        Assert.assertEquals(106L , message.getField(f("optional_sint64"  )));
        Assert.assertEquals(107  , message.getField(f("optional_fixed32" )));
        Assert.assertEquals(108L , message.getField(f("optional_fixed64" )));
        Assert.assertEquals(109  , message.getField(f("optional_sfixed32")));
        Assert.assertEquals(110L , message.getField(f("optional_sfixed64")));
        Assert.assertEquals(111F , message.getField(f("optional_float"   )));
        Assert.assertEquals(112D , message.getField(f("optional_double"  )));
        Assert.assertEquals(true , message.getField(f("optional_bool"    )));
        Assert.assertEquals("115", message.getField(f("optional_string"  )));
        Assert.assertEquals(toBytes("116"), message.getField(f("optional_bytes")));
  
        Assert.assertEquals(117,
          ((Message)message.getField(f("optionalgroup"))).getField(groupA));
        Assert.assertEquals(118,
          ((Message)message.getField(f("optional_nested_message")))
                           .getField(nestedB));
        Assert.assertEquals(119,
          ((Message)message.getField(f("optional_foreign_message")))
                           .getField(foreignC));
        Assert.assertEquals(120,
          ((Message)message.getField(f("optional_import_message")))
                           .getField(importD));
        Assert.assertEquals(126,
          ((Message)message.getField(f("optional_public_import_message")))
                           .getField(importE));
        Assert.assertEquals(127,
          ((Message)message.getField(f("optional_lazy_message")))
                           .getField(nestedB));
  
        Assert.assertEquals( nestedBaz, message.getField(f("optional_nested_enum" )));
        Assert.assertEquals(foreignBaz, message.getField(f("optional_foreign_enum")));
        Assert.assertEquals( importBaz, message.getField(f("optional_import_enum" )));
  
        Assert.assertEquals("124", message.getField(f("optional_string_piece")));
        Assert.assertEquals("125", message.getField(f("optional_cord")));
  
        // -----------------------------------------------------------------
  
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_int32"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_int64"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_uint32"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_uint64"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sint32"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sint64"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_fixed32" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_fixed64" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sfixed32")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sfixed64")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_float"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_double"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_bool"    )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_string"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_bytes"   )));
  
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeatedgroup"           )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_nested_message" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_foreign_message")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_import_message" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_lazy_message" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_nested_enum"    )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_foreign_enum"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_import_enum"    )));
  
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_string_piece")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_cord")));
  
        Assert.assertEquals(201  , message.getRepeatedField(f("repeated_int32"   ), 0));
        Assert.assertEquals(202L , message.getRepeatedField(f("repeated_int64"   ), 0));
        Assert.assertEquals(203  , message.getRepeatedField(f("repeated_uint32"  ), 0));
        Assert.assertEquals(204L , message.getRepeatedField(f("repeated_uint64"  ), 0));
        Assert.assertEquals(205  , message.getRepeatedField(f("repeated_sint32"  ), 0));
        Assert.assertEquals(206L , message.getRepeatedField(f("repeated_sint64"  ), 0));
        Assert.assertEquals(207  , message.getRepeatedField(f("repeated_fixed32" ), 0));
        Assert.assertEquals(208L , message.getRepeatedField(f("repeated_fixed64" ), 0));
        Assert.assertEquals(209  , message.getRepeatedField(f("repeated_sfixed32"), 0));
        Assert.assertEquals(210L , message.getRepeatedField(f("repeated_sfixed64"), 0));
        Assert.assertEquals(211F , message.getRepeatedField(f("repeated_float"   ), 0));
        Assert.assertEquals(212D , message.getRepeatedField(f("repeated_double"  ), 0));
        Assert.assertEquals(true , message.getRepeatedField(f("repeated_bool"    ), 0));
        Assert.assertEquals("215", message.getRepeatedField(f("repeated_string"  ), 0));
        Assert.assertEquals(toBytes("216"), message.getRepeatedField(f("repeated_bytes"), 0));
  
        Assert.assertEquals(217,
          ((Message)message.getRepeatedField(f("repeatedgroup"), 0))
                           .getField(repeatedGroupA));
        Assert.assertEquals(218,
          ((Message)message.getRepeatedField(f("repeated_nested_message"), 0))
                           .getField(nestedB));
        Assert.assertEquals(219,
          ((Message)message.getRepeatedField(f("repeated_foreign_message"), 0))
                           .getField(foreignC));
        Assert.assertEquals(220,
          ((Message)message.getRepeatedField(f("repeated_import_message"), 0))
                           .getField(importD));
        Assert.assertEquals(227,
          ((Message)message.getRepeatedField(f("repeated_lazy_message"), 0))
                           .getField(nestedB));
  
        Assert.assertEquals( nestedBar, message.getRepeatedField(f("repeated_nested_enum" ),0));
        Assert.assertEquals(foreignBar, message.getRepeatedField(f("repeated_foreign_enum"),0));
        Assert.assertEquals( importBar, message.getRepeatedField(f("repeated_import_enum" ),0));
  
        Assert.assertEquals("224", message.getRepeatedField(f("repeated_string_piece"), 0));
        Assert.assertEquals("225", message.getRepeatedField(f("repeated_cord"), 0));
  
        Assert.assertEquals(301  , message.getRepeatedField(f("repeated_int32"   ), 1));
        Assert.assertEquals(302L , message.getRepeatedField(f("repeated_int64"   ), 1));
        Assert.assertEquals(303  , message.getRepeatedField(f("repeated_uint32"  ), 1));
        Assert.assertEquals(304L , message.getRepeatedField(f("repeated_uint64"  ), 1));
        Assert.assertEquals(305  , message.getRepeatedField(f("repeated_sint32"  ), 1));
        Assert.assertEquals(306L , message.getRepeatedField(f("repeated_sint64"  ), 1));
        Assert.assertEquals(307  , message.getRepeatedField(f("repeated_fixed32" ), 1));
        Assert.assertEquals(308L , message.getRepeatedField(f("repeated_fixed64" ), 1));
        Assert.assertEquals(309  , message.getRepeatedField(f("repeated_sfixed32"), 1));
        Assert.assertEquals(310L , message.getRepeatedField(f("repeated_sfixed64"), 1));
        Assert.assertEquals(311F , message.getRepeatedField(f("repeated_float"   ), 1));
        Assert.assertEquals(312D , message.getRepeatedField(f("repeated_double"  ), 1));
        Assert.assertEquals(false, message.getRepeatedField(f("repeated_bool"    ), 1));
        Assert.assertEquals("315", message.getRepeatedField(f("repeated_string"  ), 1));
        Assert.assertEquals(toBytes("316"), message.getRepeatedField(f("repeated_bytes"), 1));
  
        Assert.assertEquals(317,
          ((Message)message.getRepeatedField(f("repeatedgroup"), 1))
                           .getField(repeatedGroupA));
        Assert.assertEquals(318,
          ((Message)message.getRepeatedField(f("repeated_nested_message"), 1))
                           .getField(nestedB));
        Assert.assertEquals(319,
          ((Message)message.getRepeatedField(f("repeated_foreign_message"), 1))
                           .getField(foreignC));
        Assert.assertEquals(320,
          ((Message)message.getRepeatedField(f("repeated_import_message"), 1))
                           .getField(importD));
        Assert.assertEquals(327,
          ((Message)message.getRepeatedField(f("repeated_lazy_message"), 1))
                           .getField(nestedB));
  
        Assert.assertEquals( nestedBaz, message.getRepeatedField(f("repeated_nested_enum" ),1));
        Assert.assertEquals(foreignBaz, message.getRepeatedField(f("repeated_foreign_enum"),1));
        Assert.assertEquals( importBaz, message.getRepeatedField(f("repeated_import_enum" ),1));
  
        Assert.assertEquals("324", message.getRepeatedField(f("repeated_string_piece"), 1));
        Assert.assertEquals("325", message.getRepeatedField(f("repeated_cord"), 1));
  
        // -----------------------------------------------------------------
  
        Assert.assertTrue(message.hasField(f("default_int32"   )));
        Assert.assertTrue(message.hasField(f("default_int64"   )));
        Assert.assertTrue(message.hasField(f("default_uint32"  )));
        Assert.assertTrue(message.hasField(f("default_uint64"  )));
        Assert.assertTrue(message.hasField(f("default_sint32"  )));
        Assert.assertTrue(message.hasField(f("default_sint64"  )));
        Assert.assertTrue(message.hasField(f("default_fixed32" )));
        Assert.assertTrue(message.hasField(f("default_fixed64" )));
        Assert.assertTrue(message.hasField(f("default_sfixed32")));
        Assert.assertTrue(message.hasField(f("default_sfixed64")));
        Assert.assertTrue(message.hasField(f("default_float"   )));
        Assert.assertTrue(message.hasField(f("default_double"  )));
        Assert.assertTrue(message.hasField(f("default_bool"    )));
        Assert.assertTrue(message.hasField(f("default_string"  )));
        Assert.assertTrue(message.hasField(f("default_bytes"   )));
  
        Assert.assertTrue(message.hasField(f("default_nested_enum" )));
        Assert.assertTrue(message.hasField(f("default_foreign_enum")));
        Assert.assertTrue(message.hasField(f("default_import_enum" )));
  
        Assert.assertTrue(message.hasField(f("default_string_piece")));
        Assert.assertTrue(message.hasField(f("default_cord")));
  
        Assert.assertEquals(401  , message.getField(f("default_int32"   )));
        Assert.assertEquals(402L , message.getField(f("default_int64"   )));
        Assert.assertEquals(403  , message.getField(f("default_uint32"  )));
        Assert.assertEquals(404L , message.getField(f("default_uint64"  )));
        Assert.assertEquals(405  , message.getField(f("default_sint32"  )));
        Assert.assertEquals(406L , message.getField(f("default_sint64"  )));
        Assert.assertEquals(407  , message.getField(f("default_fixed32" )));
        Assert.assertEquals(408L , message.getField(f("default_fixed64" )));
        Assert.assertEquals(409  , message.getField(f("default_sfixed32")));
        Assert.assertEquals(410L , message.getField(f("default_sfixed64")));
        Assert.assertEquals(411F , message.getField(f("default_float"   )));
        Assert.assertEquals(412D , message.getField(f("default_double"  )));
        Assert.assertEquals(false, message.getField(f("default_bool"    )));
        Assert.assertEquals("415", message.getField(f("default_string"  )));
        Assert.assertEquals(toBytes("416"), message.getField(f("default_bytes")));
  
        Assert.assertEquals( nestedFoo, message.getField(f("default_nested_enum" )));
        Assert.assertEquals(foreignFoo, message.getField(f("default_foreign_enum")));
        Assert.assertEquals( importFoo, message.getField(f("default_import_enum" )));
  
        Assert.assertEquals("424", message.getField(f("default_string_piece")));
        Assert.assertEquals("425", message.getField(f("default_cord")));
  
        Assert.assertTrue(message.hasField(f("oneof_bytes")));
        Assert.assertEquals(toBytes("604"), message.getField(f("oneof_bytes")));
  
        if (extensionRegistry == null) {
          Assert.assertFalse(message.hasField(f("oneof_uint32")));
          Assert.assertFalse(message.hasField(f("oneof_nested_message")));
          Assert.assertFalse(message.hasField(f("oneof_string")));
        } else {
          Assert.assertTrue(message.hasField(f("oneof_uint32")));
          Assert.assertTrue(message.hasField(f("oneof_nested_message")));
          Assert.assertTrue(message.hasField(f("oneof_string")));
          Assert.assertEquals(601, message.getField(f("oneof_uint32")));
          Assert.assertEquals(602,
              ((MessageOrBuilder) message.getField(f("oneof_nested_message")))
              .getField(nestedB));
          Assert.assertEquals("603", message.getField(f("oneof_string")));
        }
      }
  
      // -------------------------------------------------------------------
  
      /**
       * Assert (using {@code junit.framework.Assert}} that all fields of
       * {@code message} are cleared, and that getting the fields returns their
       * default values, using the {@link Message} reflection interface.
       */
      public void assertClearViaReflection(MessageOrBuilder message) {
        // has_blah() should initially be false for all optional fields.
        Assert.assertFalse(message.hasField(f("optional_int32"   )));
        Assert.assertFalse(message.hasField(f("optional_int64"   )));
        Assert.assertFalse(message.hasField(f("optional_uint32"  )));
        Assert.assertFalse(message.hasField(f("optional_uint64"  )));
        Assert.assertFalse(message.hasField(f("optional_sint32"  )));
        Assert.assertFalse(message.hasField(f("optional_sint64"  )));
        Assert.assertFalse(message.hasField(f("optional_fixed32" )));
        Assert.assertFalse(message.hasField(f("optional_fixed64" )));
        Assert.assertFalse(message.hasField(f("optional_sfixed32")));
        Assert.assertFalse(message.hasField(f("optional_sfixed64")));
        Assert.assertFalse(message.hasField(f("optional_float"   )));
        Assert.assertFalse(message.hasField(f("optional_double"  )));
        Assert.assertFalse(message.hasField(f("optional_bool"    )));
        Assert.assertFalse(message.hasField(f("optional_string"  )));
        Assert.assertFalse(message.hasField(f("optional_bytes"   )));
  
        Assert.assertFalse(message.hasField(f("optionalgroup"           )));
        Assert.assertFalse(message.hasField(f("optional_nested_message" )));
        Assert.assertFalse(message.hasField(f("optional_foreign_message")));
        Assert.assertFalse(message.hasField(f("optional_import_message" )));
  
        Assert.assertFalse(message.hasField(f("optional_nested_enum" )));
        Assert.assertFalse(message.hasField(f("optional_foreign_enum")));
        Assert.assertFalse(message.hasField(f("optional_import_enum" )));
  
        Assert.assertFalse(message.hasField(f("optional_string_piece")));
        Assert.assertFalse(message.hasField(f("optional_cord")));
  
        // Optional fields without defaults are set to zero or something like it.
        Assert.assertEquals(0    , message.getField(f("optional_int32"   )));
        Assert.assertEquals(0L   , message.getField(f("optional_int64"   )));
        Assert.assertEquals(0    , message.getField(f("optional_uint32"  )));
        Assert.assertEquals(0L   , message.getField(f("optional_uint64"  )));
        Assert.assertEquals(0    , message.getField(f("optional_sint32"  )));
        Assert.assertEquals(0L   , message.getField(f("optional_sint64"  )));
        Assert.assertEquals(0    , message.getField(f("optional_fixed32" )));
        Assert.assertEquals(0L   , message.getField(f("optional_fixed64" )));
        Assert.assertEquals(0    , message.getField(f("optional_sfixed32")));
        Assert.assertEquals(0L   , message.getField(f("optional_sfixed64")));
        Assert.assertEquals(0F   , message.getField(f("optional_float"   )));
        Assert.assertEquals(0D   , message.getField(f("optional_double"  )));
        Assert.assertEquals(false, message.getField(f("optional_bool"    )));
        Assert.assertEquals(""   , message.getField(f("optional_string"  )));
        Assert.assertEquals(ByteString.EMPTY, message.getField(f("optional_bytes")));
  
        // Embedded messages should also be clear.
        Assert.assertFalse(
          ((Message)message.getField(f("optionalgroup"))).hasField(groupA));
        Assert.assertFalse(
          ((Message)message.getField(f("optional_nested_message")))
                           .hasField(nestedB));
        Assert.assertFalse(
          ((Message)message.getField(f("optional_foreign_message")))
                           .hasField(foreignC));
        Assert.assertFalse(
          ((Message)message.getField(f("optional_import_message")))
                           .hasField(importD));
        Assert.assertFalse(
          ((Message)message.getField(f("optional_public_import_message")))
                           .hasField(importE));
        Assert.assertFalse(
          ((Message)message.getField(f("optional_lazy_message")))
                           .hasField(nestedB));
  
        Assert.assertEquals(0,
          ((Message)message.getField(f("optionalgroup"))).getField(groupA));
        Assert.assertEquals(0,
          ((Message)message.getField(f("optional_nested_message")))
                           .getField(nestedB));
        Assert.assertEquals(0,
          ((Message)message.getField(f("optional_foreign_message")))
                           .getField(foreignC));
        Assert.assertEquals(0,
          ((Message)message.getField(f("optional_import_message")))
                           .getField(importD));
        Assert.assertEquals(0,
          ((Message)message.getField(f("optional_public_import_message")))
                           .getField(importE));
        Assert.assertEquals(0,
          ((Message)message.getField(f("optional_lazy_message")))
                           .getField(nestedB));
  
        // Enums without defaults are set to the first value in the enum.
        Assert.assertEquals( nestedFoo, message.getField(f("optional_nested_enum" )));
        Assert.assertEquals(foreignFoo, message.getField(f("optional_foreign_enum")));
        Assert.assertEquals( importFoo, message.getField(f("optional_import_enum" )));
  
        Assert.assertEquals("", message.getField(f("optional_string_piece")));
        Assert.assertEquals("", message.getField(f("optional_cord")));
  
        // Repeated fields are empty.
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_int32"   )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_int64"   )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_uint32"  )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_uint64"  )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_sint32"  )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_sint64"  )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_fixed32" )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_fixed64" )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_sfixed32")));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_sfixed64")));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_float"   )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_double"  )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_bool"    )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_string"  )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_bytes"   )));
  
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeatedgroup"           )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_nested_message" )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_foreign_message")));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_import_message" )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_lazy_message"   )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_nested_enum"    )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_foreign_enum"   )));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_import_enum"    )));
  
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_string_piece")));
        Assert.assertEquals(0, message.getRepeatedFieldCount(f("repeated_cord")));
  
        // has_blah() should also be false for all default fields.
        Assert.assertFalse(message.hasField(f("default_int32"   )));
        Assert.assertFalse(message.hasField(f("default_int64"   )));
        Assert.assertFalse(message.hasField(f("default_uint32"  )));
        Assert.assertFalse(message.hasField(f("default_uint64"  )));
        Assert.assertFalse(message.hasField(f("default_sint32"  )));
        Assert.assertFalse(message.hasField(f("default_sint64"  )));
        Assert.assertFalse(message.hasField(f("default_fixed32" )));
        Assert.assertFalse(message.hasField(f("default_fixed64" )));
        Assert.assertFalse(message.hasField(f("default_sfixed32")));
        Assert.assertFalse(message.hasField(f("default_sfixed64")));
        Assert.assertFalse(message.hasField(f("default_float"   )));
        Assert.assertFalse(message.hasField(f("default_double"  )));
        Assert.assertFalse(message.hasField(f("default_bool"    )));
        Assert.assertFalse(message.hasField(f("default_string"  )));
        Assert.assertFalse(message.hasField(f("default_bytes"   )));
  
        Assert.assertFalse(message.hasField(f("default_nested_enum" )));
        Assert.assertFalse(message.hasField(f("default_foreign_enum")));
        Assert.assertFalse(message.hasField(f("default_import_enum" )));
  
        Assert.assertFalse(message.hasField(f("default_string_piece" )));
        Assert.assertFalse(message.hasField(f("default_cord" )));
  
        // Fields with defaults have their default values (duh).
        Assert.assertEquals( 41    , message.getField(f("default_int32"   )));
        Assert.assertEquals( 42L   , message.getField(f("default_int64"   )));
        Assert.assertEquals( 43    , message.getField(f("default_uint32"  )));
        Assert.assertEquals( 44L   , message.getField(f("default_uint64"  )));
        Assert.assertEquals(-45    , message.getField(f("default_sint32"  )));
        Assert.assertEquals( 46L   , message.getField(f("default_sint64"  )));
        Assert.assertEquals( 47    , message.getField(f("default_fixed32" )));
        Assert.assertEquals( 48L   , message.getField(f("default_fixed64" )));
        Assert.assertEquals( 49    , message.getField(f("default_sfixed32")));
        Assert.assertEquals(-50L   , message.getField(f("default_sfixed64")));
        Assert.assertEquals( 51.5F , message.getField(f("default_float"   )));
        Assert.assertEquals( 52e3D , message.getField(f("default_double"  )));
        Assert.assertEquals(true   , message.getField(f("default_bool"    )));
        Assert.assertEquals("hello", message.getField(f("default_string"  )));
        Assert.assertEquals(toBytes("world"), message.getField(f("default_bytes")));
  
        Assert.assertEquals( nestedBar, message.getField(f("default_nested_enum" )));
        Assert.assertEquals(foreignBar, message.getField(f("default_foreign_enum")));
        Assert.assertEquals( importBar, message.getField(f("default_import_enum" )));
  
        Assert.assertEquals("abc", message.getField(f("default_string_piece")));
        Assert.assertEquals("123", message.getField(f("default_cord")));
  
        Assert.assertFalse(message.hasField(f("oneof_uint32")));
        Assert.assertFalse(message.hasField(f("oneof_nested_message")));
        Assert.assertFalse(message.hasField(f("oneof_string")));
        Assert.assertFalse(message.hasField(f("oneof_bytes")));
  
        Assert.assertEquals(0, message.getField(f("oneof_uint32")));
        Assert.assertEquals("", message.getField(f("oneof_string")));
        Assert.assertEquals(toBytes(""), message.getField(f("oneof_bytes")));
      }
  
  
      // ---------------------------------------------------------------
  
      public void assertRepeatedFieldsModifiedViaReflection(
          MessageOrBuilder message) {
        // ModifyRepeatedFields only sets the second repeated element of each
        // field.  In addition to verifying this, we also verify that the first
        // element and size were *not* modified.
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_int32"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_int64"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_uint32"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_uint64"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sint32"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sint64"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_fixed32" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_fixed64" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sfixed32")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_sfixed64")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_float"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_double"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_bool"    )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_string"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_bytes"   )));
  
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeatedgroup"           )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_nested_message" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_foreign_message")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_import_message" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_lazy_message"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_nested_enum"    )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_foreign_enum"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_import_enum"    )));
  
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_string_piece")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("repeated_cord")));
  
        Assert.assertEquals(201  , message.getRepeatedField(f("repeated_int32"   ), 0));
        Assert.assertEquals(202L , message.getRepeatedField(f("repeated_int64"   ), 0));
        Assert.assertEquals(203  , message.getRepeatedField(f("repeated_uint32"  ), 0));
        Assert.assertEquals(204L , message.getRepeatedField(f("repeated_uint64"  ), 0));
        Assert.assertEquals(205  , message.getRepeatedField(f("repeated_sint32"  ), 0));
        Assert.assertEquals(206L , message.getRepeatedField(f("repeated_sint64"  ), 0));
        Assert.assertEquals(207  , message.getRepeatedField(f("repeated_fixed32" ), 0));
        Assert.assertEquals(208L , message.getRepeatedField(f("repeated_fixed64" ), 0));
        Assert.assertEquals(209  , message.getRepeatedField(f("repeated_sfixed32"), 0));
        Assert.assertEquals(210L , message.getRepeatedField(f("repeated_sfixed64"), 0));
        Assert.assertEquals(211F , message.getRepeatedField(f("repeated_float"   ), 0));
        Assert.assertEquals(212D , message.getRepeatedField(f("repeated_double"  ), 0));
        Assert.assertEquals(true , message.getRepeatedField(f("repeated_bool"    ), 0));
        Assert.assertEquals("215", message.getRepeatedField(f("repeated_string"  ), 0));
        Assert.assertEquals(toBytes("216"), message.getRepeatedField(f("repeated_bytes"), 0));
  
        Assert.assertEquals(217,
          ((Message)message.getRepeatedField(f("repeatedgroup"), 0))
                           .getField(repeatedGroupA));
        Assert.assertEquals(218,
          ((Message)message.getRepeatedField(f("repeated_nested_message"), 0))
                           .getField(nestedB));
        Assert.assertEquals(219,
          ((Message)message.getRepeatedField(f("repeated_foreign_message"), 0))
                           .getField(foreignC));
        Assert.assertEquals(220,
          ((Message)message.getRepeatedField(f("repeated_import_message"), 0))
                           .getField(importD));
        Assert.assertEquals(227,
          ((Message)message.getRepeatedField(f("repeated_lazy_message"), 0))
                           .getField(nestedB));
  
        Assert.assertEquals( nestedBar, message.getRepeatedField(f("repeated_nested_enum" ),0));
        Assert.assertEquals(foreignBar, message.getRepeatedField(f("repeated_foreign_enum"),0));
        Assert.assertEquals( importBar, message.getRepeatedField(f("repeated_import_enum" ),0));
  
        Assert.assertEquals("224", message.getRepeatedField(f("repeated_string_piece"), 0));
        Assert.assertEquals("225", message.getRepeatedField(f("repeated_cord"), 0));
  
        Assert.assertEquals(501  , message.getRepeatedField(f("repeated_int32"   ), 1));
        Assert.assertEquals(502L , message.getRepeatedField(f("repeated_int64"   ), 1));
        Assert.assertEquals(503  , message.getRepeatedField(f("repeated_uint32"  ), 1));
        Assert.assertEquals(504L , message.getRepeatedField(f("repeated_uint64"  ), 1));
        Assert.assertEquals(505  , message.getRepeatedField(f("repeated_sint32"  ), 1));
        Assert.assertEquals(506L , message.getRepeatedField(f("repeated_sint64"  ), 1));
        Assert.assertEquals(507  , message.getRepeatedField(f("repeated_fixed32" ), 1));
        Assert.assertEquals(508L , message.getRepeatedField(f("repeated_fixed64" ), 1));
        Assert.assertEquals(509  , message.getRepeatedField(f("repeated_sfixed32"), 1));
        Assert.assertEquals(510L , message.getRepeatedField(f("repeated_sfixed64"), 1));
        Assert.assertEquals(511F , message.getRepeatedField(f("repeated_float"   ), 1));
        Assert.assertEquals(512D , message.getRepeatedField(f("repeated_double"  ), 1));
        Assert.assertEquals(true , message.getRepeatedField(f("repeated_bool"    ), 1));
        Assert.assertEquals("515", message.getRepeatedField(f("repeated_string"  ), 1));
        Assert.assertEquals(toBytes("516"), message.getRepeatedField(f("repeated_bytes"), 1));
  
        Assert.assertEquals(517,
          ((Message)message.getRepeatedField(f("repeatedgroup"), 1))
                           .getField(repeatedGroupA));
        Assert.assertEquals(518,
          ((Message)message.getRepeatedField(f("repeated_nested_message"), 1))
                           .getField(nestedB));
        Assert.assertEquals(519,
          ((Message)message.getRepeatedField(f("repeated_foreign_message"), 1))
                           .getField(foreignC));
        Assert.assertEquals(520,
          ((Message)message.getRepeatedField(f("repeated_import_message"), 1))
                           .getField(importD));
        Assert.assertEquals(527,
          ((Message)message.getRepeatedField(f("repeated_lazy_message"), 1))
                           .getField(nestedB));
  
        Assert.assertEquals( nestedFoo, message.getRepeatedField(f("repeated_nested_enum" ),1));
        Assert.assertEquals(foreignFoo, message.getRepeatedField(f("repeated_foreign_enum"),1));
        Assert.assertEquals( importFoo, message.getRepeatedField(f("repeated_import_enum" ),1));
  
        Assert.assertEquals("524", message.getRepeatedField(f("repeated_string_piece"), 1));
        Assert.assertEquals("525", message.getRepeatedField(f("repeated_cord"), 1));
      }
  
      public void setPackedFieldsViaReflection(Message.Builder message) {
        message.addRepeatedField(f("packed_int32"   ), 601 );
        message.addRepeatedField(f("packed_int64"   ), 602L);
        message.addRepeatedField(f("packed_uint32"  ), 603 );
        message.addRepeatedField(f("packed_uint64"  ), 604L);
        message.addRepeatedField(f("packed_sint32"  ), 605 );
        message.addRepeatedField(f("packed_sint64"  ), 606L);
        message.addRepeatedField(f("packed_fixed32" ), 607 );
        message.addRepeatedField(f("packed_fixed64" ), 608L);
        message.addRepeatedField(f("packed_sfixed32"), 609 );
        message.addRepeatedField(f("packed_sfixed64"), 610L);
        message.addRepeatedField(f("packed_float"   ), 611F);
        message.addRepeatedField(f("packed_double"  ), 612D);
        message.addRepeatedField(f("packed_bool"    ), true);
        message.addRepeatedField(f("packed_enum" ),  foreignBar);
        // Add a second one of each field.
        message.addRepeatedField(f("packed_int32"   ), 701 );
        message.addRepeatedField(f("packed_int64"   ), 702L);
        message.addRepeatedField(f("packed_uint32"  ), 703 );
        message.addRepeatedField(f("packed_uint64"  ), 704L);
        message.addRepeatedField(f("packed_sint32"  ), 705 );
        message.addRepeatedField(f("packed_sint64"  ), 706L);
        message.addRepeatedField(f("packed_fixed32" ), 707 );
        message.addRepeatedField(f("packed_fixed64" ), 708L);
        message.addRepeatedField(f("packed_sfixed32"), 709 );
        message.addRepeatedField(f("packed_sfixed64"), 710L);
        message.addRepeatedField(f("packed_float"   ), 711F);
        message.addRepeatedField(f("packed_double"  ), 712D);
        message.addRepeatedField(f("packed_bool"    ), false);
        message.addRepeatedField(f("packed_enum" ),  foreignBaz);
      }
  
      public void assertPackedFieldsSetViaReflection(MessageOrBuilder message) {
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_int32"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_int64"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_uint32"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_uint64"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_sint32"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_sint64"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_fixed32" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_fixed64" )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_sfixed32")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_sfixed64")));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_float"   )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_double"  )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_bool"    )));
        Assert.assertEquals(2, message.getRepeatedFieldCount(f("packed_enum"   )));
        Assert.assertEquals(601  , message.getRepeatedField(f("packed_int32"   ), 0));
        Assert.assertEquals(602L , message.getRepeatedField(f("packed_int64"   ), 0));
        Assert.assertEquals(603  , message.getRepeatedField(f("packed_uint32"  ), 0));
        Assert.assertEquals(604L , message.getRepeatedField(f("packed_uint64"  ), 0));
        Assert.assertEquals(605  , message.getRepeatedField(f("packed_sint32"  ), 0));
        Assert.assertEquals(606L , message.getRepeatedField(f("packed_sint64"  ), 0));
        Assert.assertEquals(607  , message.getRepeatedField(f("packed_fixed32" ), 0));
        Assert.assertEquals(608L , message.getRepeatedField(f("packed_fixed64" ), 0));
        Assert.assertEquals(609  , message.getRepeatedField(f("packed_sfixed32"), 0));
        Assert.assertEquals(610L , message.getRepeatedField(f("packed_sfixed64"), 0));
        Assert.assertEquals(611F , message.getRepeatedField(f("packed_float"   ), 0));
        Assert.assertEquals(612D , message.getRepeatedField(f("packed_double"  ), 0));
        Assert.assertEquals(true , message.getRepeatedField(f("packed_bool"    ), 0));
        Assert.assertEquals(foreignBar, message.getRepeatedField(f("packed_enum" ),0));
        Assert.assertEquals(701  , message.getRepeatedField(f("packed_int32"   ), 1));
        Assert.assertEquals(702L , message.getRepeatedField(f("packed_int64"   ), 1));
        Assert.assertEquals(703  , message.getRepeatedField(f("packed_uint32"  ), 1));
        Assert.assertEquals(704L , message.getRepeatedField(f("packed_uint64"  ), 1));
        Assert.assertEquals(705  , message.getRepeatedField(f("packed_sint32"  ), 1));
        Assert.assertEquals(706L , message.getRepeatedField(f("packed_sint64"  ), 1));
        Assert.assertEquals(707  , message.getRepeatedField(f("packed_fixed32" ), 1));
        Assert.assertEquals(708L , message.getRepeatedField(f("packed_fixed64" ), 1));
        Assert.assertEquals(709  , message.getRepeatedField(f("packed_sfixed32"), 1));
        Assert.assertEquals(710L , message.getRepeatedField(f("packed_sfixed64"), 1));
        Assert.assertEquals(711F , message.getRepeatedField(f("packed_float"   ), 1));
        Assert.assertEquals(712D , message.getRepeatedField(f("packed_double"  ), 1));
        Assert.assertEquals(false, message.getRepeatedField(f("packed_bool"    ), 1));
        Assert.assertEquals(foreignBaz, message.getRepeatedField(f("packed_enum" ),1));
      }
  
      /**
       * Verifies that the reflection setters for the given.Builder object throw a
       * NullPointerException if they are passed a null value.  Uses Assert to throw an
       * appropriate assertion failure, if the condition is not verified.
       */
      public void assertReflectionSettersRejectNull(Message.Builder builder)
          throws Exception {
        try {
          builder.setField(f("optional_string"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.setField(f("optional_bytes"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.setField(f("optional_nested_enum"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.setField(f("optional_nested_message"),
                           (TestAllTypes.NestedMessage) null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.setField(f("optional_nested_message"),
                           (TestAllTypes.NestedMessage.Builder) null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
  
        try {
          builder.addRepeatedField(f("repeated_string"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.addRepeatedField(f("repeated_bytes"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.addRepeatedField(f("repeated_nested_enum"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
        try {
          builder.addRepeatedField(f("repeated_nested_message"), null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
      }
  
      /**
       * Verifies that the reflection repeated setters for the given Builder object throw a
       * NullPointerException if they are passed a null value.  Uses Assert to throw an appropriate
       * assertion failure, if the condition is not verified.
       */
      public void assertReflectionRepeatedSettersRejectNull(Message.Builder builder)
          throws Exception {
        builder.addRepeatedField(f("repeated_string"), "one");
        try {
          builder.setRepeatedField(f("repeated_string"), 0, null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
  
        builder.addRepeatedField(f("repeated_bytes"), toBytes("one"));
        try {
          builder.setRepeatedField(f("repeated_bytes"), 0, null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
  
        builder.addRepeatedField(f("repeated_nested_enum"), nestedBaz);
        try {
          builder.setRepeatedField(f("repeated_nested_enum"), 0, null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
  
        builder.addRepeatedField(
            f("repeated_nested_message"),
            TestAllTypes.NestedMessage.newBuilder().setBb(218).build());
        try {
          builder.setRepeatedField(f("repeated_nested_message"), 0, null);
          Assert.fail("Exception was not thrown");
        } catch (NullPointerException e) {
          // We expect this exception.
        }
      }
    }
  
    /**
     * @param filePath The path relative to
     * {@link #getTestDataDir}.
     */
    public static String readTextFromFile(String filePath) {
      return readBytesFromFile(filePath).toStringUtf8();
    }
  
    private static File getTestDataDir() {
      // Search each parent directory looking for "src/google/protobuf".
      File ancestor = new File(System.getProperty("protobuf.dir", "."));
      String initialPath = ancestor.getAbsolutePath();
      try {
        ancestor = ancestor.getCanonicalFile();
      } catch (IOException e) {
        throw new RuntimeException(
          "Couldn't get canonical name of working directory.", e);
      }
      while (ancestor != null && ancestor.exists()) {
        if (new File(ancestor, "src/google/protobuf").exists()) {
          return new File(ancestor, "src/google/protobuf/testdata");
        }
        ancestor = ancestor.getParentFile();
      }
  
      throw new RuntimeException(
        "Could not find golden files.  This test must be run from within the " +
        "protobuf source package so that it can read test data files from the " +
        "C++ source tree: " + initialPath);
    }
  
    /**
     * @param filename The path relative to
     * {@link #getTestDataDir}.
     */
    public static ByteString readBytesFromFile(String filename) {
      File fullPath = new File(getTestDataDir(), filename);
      try {
        RandomAccessFile file = new RandomAccessFile(fullPath, "r");
        byte[] content = new byte[(int) file.length()];
        file.readFully(content);
        return ByteString.copyFrom(content);
      } catch (IOException e) {
        // Throw a RuntimeException here so that we can call this function from
        // static initializers.
        throw new IllegalArgumentException(
          "Couldn't read file: " + fullPath.getPath(), e);
      }
    }
  
    /**
     * Get the bytes of the "golden message".  This is a serialized TestAllTypes
     * with all fields set as they would be by
     * {@link #setAllFields(TestAllTypes.Builder)}, but it is loaded from a file
     * on disk rather than generated dynamically.  The file is actually generated
     * by C++ code, so testing against it verifies compatibility with C++.
     */
    public static ByteString getGoldenMessage() {
      if (goldenMessage == null) {
        goldenMessage = readBytesFromFile("golden_message_oneof_implemented");
      }
      return goldenMessage;
    }
    private static ByteString goldenMessage = null;
  
    /**
     * Get the bytes of the "golden packed fields message".  This is a serialized
     * TestPackedTypes with all fields set as they would be by
     * {@link #setPackedFields(TestPackedTypes.Builder)}, but it is loaded from a
     * file on disk rather than generated dynamically.  The file is actually
     * generated by C++ code, so testing against it verifies compatibility with
     * C++.
     */
    public static ByteString getGoldenPackedFieldsMessage() {
      if (goldenPackedFieldsMessage == null) {
        goldenPackedFieldsMessage =
            readBytesFromFile("golden_packed_fields_message");
      }
      return goldenPackedFieldsMessage;
    }
    private static ByteString goldenPackedFieldsMessage = null;
  
    /**
     * Mock implementation of {@link GeneratedMessage.BuilderParent} for testing.
     *
     * @author jonp@google.com (Jon Perlow)
     */
    public static class MockBuilderParent
        implements GeneratedMessage.BuilderParent {
  
      private int invalidations;
  
      @Override
      public void markDirty() {
        invalidations++;
      }
  
      public int getInvalidationCount() {
        return invalidations;
      }
    }
  }
  